31263147 has 6 divisors (see below), whose sum is σ = 45157892. Its totient is φ = 20842092.

The previous prime is 31263109. The next prime is 31263173. The reversal of 31263147 is 74136213.

It is not a de Polignac number, because 31263147 - 2⁶ = 31263083 is a prime.

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 31263147.

It is not an unprimeable number, because it can be changed into a prime (31263047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1736833 + ... + 1736850.

Almost surely, 2^31263147 is an apocalyptic number.

31263147 is a deficient number, since it is larger than the sum of its proper divisors (13894745).

31263147 is a wasteful number, since it uses less digits than its factorization.

31263147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473689 (or 3473686 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 31263147 is about 5591.3457235267. The cubic root of 31263147 is about 315.0244274330.

The spelling of 31263147 in words is "thirty-one million, two hundred sixty-three thousand, one hundred forty-seven".