31472256 has 64 divisors (see below), whose sum is σ = 85680000. Its totient is φ = 10229760.

The previous prime is 31472239. The next prime is 31472261. The reversal of 31472256 is 65227413.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14745 + ... + 16743.

It is an arithmetic number, because the mean of its divisors is an integer number (1338750).

Almost surely, 2^31472256 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 31472256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42840000).

31472256 is an abundant number, since it is smaller than the sum of its proper divisors (54207744).

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

31472256 is a wasteful number, since it uses less digits than its factorization.

31472256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057 (or 2045 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 31472256 is about 5610.0139037261. The cubic root of 31472256 is about 315.7252324995.

Adding to 31472256 its reverse (65227413), we get a palindrome (96699669).

The spelling of 31472256 in words is "thirty-one million, four hundred seventy-two thousand, two hundred fifty-six".