31225360 has 40 divisors (see below), whose sum is σ = 76423680. Its totient is φ = 11832192.

The previous prime is 31225357. The next prime is 31225361. The reversal of 31225360 is 6352213.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (31225361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8752 + ... + 11791.

It is an arithmetic number, because the mean of its divisors is an integer number (1910592).

Almost surely, 2^31225360 is an apocalyptic number.

It is an amenable number.

31225360 is an abundant number, since it is smaller than the sum of its proper divisors (45198320).

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

31225360 is a wasteful number, since it uses less digits than its factorization.

31225360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20575 (or 20569 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 31225360 is about 5587.9656405529. The cubic root of 31225360 is about 314.8974554936.

Adding to 31225360 its reverse (6352213), we get a palindrome (37577573).

The spelling of 31225360 in words is "thirty-one million, two hundred twenty-five thousand, three hundred sixty".