247397031 has 48 divisors (see below), whose sum is σ = 432871680. Its totient is φ = 139209840.

The previous prime is 247397027. The next prime is 247397053. The reversal of 247397031 is 130793742.

It is not a de Polignac number, because 247397031 - 2² = 247397027 is a prime.

It is a super-2 number, since 2×247397031² = 122410581895229922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247397431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87246 + ... + 90036.

It is an arithmetic number, because the mean of its divisors is an integer number (9018160).

Almost surely, 2^247397031 is an apocalyptic number.

247397031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

247397031 is a deficient number, since it is larger than the sum of its proper divisors (185474649).

247397031 is a wasteful number, since it uses less digits than its factorization.

247397031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 247397031 is about 15728.8598124594. The cubic root of 247397031 is about 627.7665357657.

The spelling of 247397031 in words is "two hundred forty-seven million, three hundred ninety-seven thousand, thirty-one".