51241240261431 has 24 divisors (see below), whose sum is σ = 80751704950800. Its totient is φ = 31052246198400.

The previous prime is 51241240261403. The next prime is 51241240261451. The reversal of 51241240261431 is 13416204214215.

51241240261431 is a `hidden beast` number, since 5 + 1 + 2 + 4 + 1 + 2 + 4 + 0 + 2 + 614 + 31 = 666.

It is not a de Polignac number, because 51241240261431 - 2¹⁴ = 51241240245047 is a prime.

It is a super-2 number, since 2×51241240261431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51241240261451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24411406 + ... + 26427243.

It is an arithmetic number, because the mean of its divisors is an integer number (3364654372950).

Almost surely, 2^{51241240261431} is an apocalyptic number.

51241240261431 is a deficient number, since it is larger than the sum of its proper divisors (29510464689369).

51241240261431 is a wasteful number, since it uses less digits than its factorization.

51241240261431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50848847 (or 50848844 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 51241240261431 its reverse (13416204214215), we get a palindrome (64657444475646).

The spelling of 51241240261431 in words is "fifty-one trillion, two hundred forty-one billion, two hundred forty million, two hundred sixty-one thousand, four hundred thirty-one".