31013432 has 8 divisors (see below), whose sum is σ = 58150200. Its totient is φ = 15506712.

The previous prime is 31013431. The next prime is 31013461. The reversal of 31013432 is 23431013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 31013432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1938332 + ... + 1938347.

It is an arithmetic number, because the mean of its divisors is an integer number (7268775).

Almost surely, 2^31013432 is an apocalyptic number.

It is an amenable number.

31013432 is a deficient number, since it is larger than the sum of its proper divisors (27136768).

31013432 is a wasteful number, since it uses less digits than its factorization.

31013432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876685 (or 3876681 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31013432 is about 5568.9704614049. The cubic root of 31013432 is about 314.1834296823.

Adding to 31013432 its reverse (23431013), we get a palindrome (54444445).

The spelling of 31013432 in words is "thirty-one million, thirteen thousand, four hundred thirty-two".