5531631240 has 128 divisors (see below), whose sum is σ = 16893360000. Its totient is φ = 1448798208.

The previous prime is 5531631233. The next prime is 5531631247. The reversal of 5531631240 is 421361355.

It is an interprime number because it is at equal distance from previous prime (5531631233) and next prime (5531631247).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 5531631198 and 5531631207.

It is not an unprimeable number, because it can be changed into a prime (5531631247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1675111 + ... + 1678409.

It is an arithmetic number, because the mean of its divisors is an integer number (131979375).

Almost surely, 2^5531631240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5531631240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8446680000).

5531631240 is an abundant number, since it is smaller than the sum of its proper divisors (11361728760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5531631240 is a wasteful number, since it uses less digits than its factorization.

5531631240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 5531631240 is about 74374.9369075363. The cubic root of 5531631240 is about 1768.5516192329.

Adding to 5531631240 its reverse (421361355), we get a palindrome (5952992595).

The spelling of 5531631240 in words is "five billion, five hundred thirty-one million, six hundred thirty-one thousand, two hundred forty".