31425590 has 64 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 10158720.

The previous prime is 31425577. The next prime is 31425593. The reversal of 31425590 is 9552413.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31425593) 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, 210836 + ... + 210984.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^31425590 is an apocalyptic number.

31425590 is an abundant number, since it is smaller than the sum of its proper divisors (37003210).

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

31425590 is a wasteful number, since it uses less digits than its factorization.

31425590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 31425590 is about 5605.8531910852. The cubic root of 31425590 is about 315.5691063983.

The spelling of 31425590 in words is "thirty-one million, four hundred twenty-five thousand, five hundred ninety".