31401032 has 16 divisors (see below), whose sum is σ = 63406140. Its totient is φ = 14492736.

The previous prime is 31401017. The next prime is 31401037. The reversal of 31401032 is 23010413.

It can be written as a sum of positive squares in 2 ways, for example, as 28665316 + 2735716 = 5354^2 + 1654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31400998 and 31401016.

It is not an unprimeable number, because it can be changed into a prime (31401037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150863 + ... + 151070.

Almost surely, 2^31401032 is an apocalyptic number.

It is an amenable number.

31401032 is an abundant number, since it is smaller than the sum of its proper divisors (32005108).

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

31401032 is a wasteful number, since it uses less digits than its factorization.

31401032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301952 (or 301948 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31401032 is about 5603.6623738409. The cubic root of 31401032 is about 315.4868829013.

Adding to 31401032 its reverse (23010413), we get a palindrome (54411445).

The spelling of 31401032 in words is "thirty-one million, four hundred one thousand, thirty-two".