31263961 has 4 divisors (see below), whose sum is σ = 31438800. Its totient is φ = 31089124.

The previous prime is 31263941. The next prime is 31263983. The reversal of 31263961 is 16936213.

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 a de Polignac number, because none of the positive numbers 2^k-31263961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31263941) 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, 87151 + ... + 87508.

It is an arithmetic number, because the mean of its divisors is an integer number (7859700).

Almost surely, 2^31263961 is an apocalyptic number.

It is an amenable number.

31263961 is a deficient number, since it is larger than the sum of its proper divisors (174839).

31263961 is a wasteful number, since it uses less digits than its factorization.

31263961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174838.

The product of its digits is 5832, while the sum is 31.

The square root of 31263961 is about 5591.4185141161. The cubic root of 31263961 is about 315.0271615111.

The spelling of 31263961 in words is "thirty-one million, two hundred sixty-three thousand, nine hundred sixty-one".