31411961 has 4 divisors (see below), whose sum is σ = 35899392. Its totient is φ = 26924532.

The previous prime is 31411957. The next prime is 31411967. The reversal of 31411961 is 16911413.

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 31411961 - 2² = 31411957 is a prime.

It is a super-2 number, since 2×31411961² = 1973422587731042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31411961.

It is not an unprimeable number, because it can be changed into a prime (31411967) 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, 2243705 + ... + 2243718.

It is an arithmetic number, because the mean of its divisors is an integer number (8974848).

Almost surely, 2^31411961 is an apocalyptic number.

It is an amenable number.

31411961 is a deficient number, since it is larger than the sum of its proper divisors (4487431).

31411961 is an equidigital number, since it uses as much as digits as its factorization.

31411961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487430.

The product of its digits is 648, while the sum is 26.

The square root of 31411961 is about 5604.6374548226. The cubic root of 31411961 is about 315.5234799597.

The spelling of 31411961 in words is "thirty-one million, four hundred eleven thousand, nine hundred sixty-one".