31243037049 has 81 divisors (see below), whose sum is σ = 55530564453. Its totient is φ = 16875344304.

The previous prime is 31243037041. The next prime is 31243037081. The reversal of 31243037049 is 94073034213.

The square root of 31243037049 is 176757.

It is a perfect power (a square), and thus also a powerful number.

31243037049 is a `hidden beast` number, since 3 + 1 + 243 + 0 + 370 + 49 = 666.

It is not a de Polignac number, because 31243037049 - 2³ = 31243037041 is a prime.

It is a super-2 number, since 2×31243037049² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31243037041) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 70525822 + ... + 70526264.

Almost surely, 2^31243037049 is an apocalyptic number.

31243037049 is the 176757-th square number.

31243037049 is the 88379-th centered octagonal number.

It is an amenable number.

31243037049 is a deficient number, since it is larger than the sum of its proper divisors (24287527404).

31243037049 is an equidigital number, since it uses as much as digits as its factorization.

31243037049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

Multiplying 31243037049 by its sum of digits (36), we get a square (1124749333764 = 1060542²).

The spelling of 31243037049 in words is "thirty-one billion, two hundred forty-three million, thirty-seven thousand, forty-nine".