31642045 has 16 divisors (see below), whose sum is σ = 40124160. Its totient is φ = 23915584.

The previous prime is 31642033. The next prime is 31642057. The reversal of 31642045 is 54024613.

It is an interprime number because it is at equal distance from previous prime (31642033) and next prime (31642057).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31642045 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4494 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (2507760).

Almost surely, 2^31642045 is an apocalyptic number.

It is an amenable number.

31642045 is a deficient number, since it is larger than the sum of its proper divisors (8482115).

31642045 is a wasteful number, since it uses less digits than its factorization.

31642045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 31642045 is about 5625.1262208061. The cubic root of 31642045 is about 316.2919809705.

Adding to 31642045 its reverse (54024613), we get a palindrome (85666658).

The spelling of 31642045 in words is "thirty-one million, six hundred forty-two thousand, forty-five".