2631268731 has 16 divisors (see below), whose sum is σ = 4317979904. Its totient is φ = 1387921824.

The previous prime is 2631268723. The next prime is 2631268741. The reversal of 2631268731 is 1378621362.

It is not a de Polignac number, because 2631268731 - 2³ = 2631268723 is a prime.

It is a super-2 number, since 2×2631268731² = 13847150269476700722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2631268731.

It is not an unprimeable number, because it can be changed into a prime (2631268741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4818901 + ... + 4819446.

It is an arithmetic number, because the mean of its divisors is an integer number (269873744).

Almost surely, 2^2631268731 is an apocalyptic number.

2631268731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2631268731 is a deficient number, since it is larger than the sum of its proper divisors (1686711173).

2631268731 is a wasteful number, since it uses less digits than its factorization.

2631268731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638370.

The product of its digits is 72576, while the sum is 39.

The square root of 2631268731 is about 51295.8938999994. The cubic root of 2631268731 is about 1380.5593075212.

The spelling of 2631268731 in words is "two billion, six hundred thirty-one million, two hundred sixty-eight thousand, seven hundred thirty-one".