31495961 has 4 divisors (see below), whose sum is σ = 35995392. Its totient is φ = 26996532.

The previous prime is 31495949. The next prime is 31495979. The reversal of 31495961 is 16959413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31495961 - 2⁶ = 31495897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31495921) 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, 2249705 + ... + 2249718.

It is an arithmetic number, because the mean of its divisors is an integer number (8998848).

Almost surely, 2^31495961 is an apocalyptic number.

It is an amenable number.

31495961 is a deficient number, since it is larger than the sum of its proper divisors (4499431).

31495961 is an equidigital number, since it uses as much as digits as its factorization.

31495961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499430.

The product of its digits is 29160, while the sum is 38.

The square root of 31495961 is about 5612.1262459072. The cubic root of 31495961 is about 315.8044810115.

The spelling of 31495961 in words is "thirty-one million, four hundred ninety-five thousand, nine hundred sixty-one".