2551531332 has 72 divisors (see below), whose sum is σ = 7020574176. Its totient is φ = 719010432.

The previous prime is 2551531313. The next prime is 2551531349. The reversal of 2551531332 is 2331351552.

It is a self number, because there is not a number n which added to its sum of digits gives 2551531332.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13203 + ... + 72645.

Almost surely, 2^2551531332 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 2551531332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3510287088).

2551531332 is an abundant number, since it is smaller than the sum of its proper divisors (4469042844).

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

2551531332 is a wasteful number, since it uses less digits than its factorization.

2551531332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59537 (or 59528 counting only the distinct ones).

The product of its digits is 13500, while the sum is 30.

The square root of 2551531332 is about 50512.6848623195. The cubic root of 2551531332 is about 1366.4706306431.

Adding to 2551531332 its reverse (2331351552), we get a palindrome (4882882884).

The spelling of 2551531332 in words is "two billion, five hundred fifty-one million, five hundred thirty-one thousand, three hundred thirty-two".