31401132 has 24 divisors (see below), whose sum is σ = 83736576. Its totient is φ = 8971728.

The previous prime is 31401119. The next prime is 31401133. The reversal of 31401132 is 23110413.

It is not an unprimeable number, because it can be changed into a prime (31401133) 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, 186828 + ... + 186995.

It is an arithmetic number, because the mean of its divisors is an integer number (3489024).

Almost surely, 2^31401132 is an apocalyptic number.

It is an amenable number.

31401132 is an abundant number, since it is smaller than the sum of its proper divisors (52335444).

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

31401132 is a wasteful number, since it uses less digits than its factorization.

31401132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373837 (or 373835 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31401132 is about 5603.6712965698. The cubic root of 31401132 is about 315.4872178017.

Adding to 31401132 its reverse (23110413), we get a palindrome (54511545).

The spelling of 31401132 in words is "thirty-one million, four hundred one thousand, one hundred thirty-two".