31040425042561 has 32 divisors (see below), whose sum is σ = 35785455906816. Its totient is φ = 26659833480000.

The previous prime is 31040425042493. The next prime is 31040425042619. The reversal of 31040425042561 is 16524052404013.

It is a cyclic number.

It is not a de Polignac number, because 31040425042561 - 2³³ = 31031835107969 is a prime.

It is a super-2 number, since 2×31040425042561² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31040425042561.

It is not an unprimeable number, because it can be changed into a prime (31040425040561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28751986 + ... + 29812036.

It is an arithmetic number, because the mean of its divisors is an integer number (1118295497088).

Almost surely, 2^{31040425042561} is an apocalyptic number.

31040425042561 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31040425042561 is a deficient number, since it is larger than the sum of its proper divisors (4745030864255).

31040425042561 is a wasteful number, since it uses less digits than its factorization.

31040425042561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062133.

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 31040425042561 its reverse (16524052404013), we get a palindrome (47564477446574).

The spelling of 31040425042561 in words is "thirty-one trillion, forty billion, four hundred twenty-five million, forty-two thousand, five hundred sixty-one".