31241997 has 8 divisors (see below), whose sum is σ = 46284480. Its totient is φ = 20827980.

The previous prime is 31241993. The next prime is 31242007. The reversal of 31241997 is 79914213.

It is not a de Polignac number, because 31241997 - 2² = 31241993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31241993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578529 + ... + 578582.

It is an arithmetic number, because the mean of its divisors is an integer number (5785560).

Almost surely, 2^31241997 is an apocalyptic number.

It is an amenable number.

31241997 is a deficient number, since it is larger than the sum of its proper divisors (15042483).

31241997 is a wasteful number, since it uses less digits than its factorization.

31241997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157120 (or 1157114 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 31241997 is about 5589.4540878336. The cubic root of 31241997 is about 314.9533717830.

The spelling of 31241997 in words is "thirty-one million, two hundred forty-one thousand, nine hundred ninety-seven".