31396995 has 72 divisors (see below), whose sum is σ = 65622960. Its totient is φ = 13829760.

The previous prime is 31396993. The next prime is 31396997. The reversal of 31396995 is 59969313.

It is an interprime number because it is at equal distance from previous prime (31396993) and next prime (31396997).

It is not a de Polignac number, because 31396995 - 2¹ = 31396993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 31396995.

It is not an unprimeable number, because it can be changed into a prime (31396993) 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 in 71 ways as a sum of consecutive naturals, for example, 63700 + ... + 64190.

It is an arithmetic number, because the mean of its divisors is an integer number (911430).

Almost surely, 2^31396995 is an apocalyptic number.

31396995 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31396995 is an abundant number, since it is smaller than the sum of its proper divisors (34225965).

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

31396995 is a wasteful number, since it uses less digits than its factorization.

31396995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 535 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 31396995 is about 5603.3021514104. The cubic root of 31396995 is about 315.4733623783.

The spelling of 31396995 in words is "thirty-one million, three hundred ninety-six thousand, nine hundred ninety-five".