51466431431 has 16 divisors (see below), whose sum is σ = 58218140160. Its totient is φ = 45204635520.

The previous prime is 51466431427. The next prime is 51466431449. The reversal of 51466431431 is 13413466415.

It is a cyclic number.

It is not a de Polignac number, because 51466431431 - 2² = 51466431427 is a prime.

It is a super-2 number, since 2×51466431431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51466431131) 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, 1167455 + ... + 1210736.

It is an arithmetic number, because the mean of its divisors is an integer number (3638633760).

Almost surely, 2^51466431431 is an apocalyptic number.

51466431431 is a deficient number, since it is larger than the sum of its proper divisors (6751708729).

51466431431 is a wasteful number, since it uses less digits than its factorization.

51466431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378294.

The product of its digits is 103680, while the sum is 38.

Adding to 51466431431 its reverse (13413466415), we get a palindrome (64879897846).

The spelling of 51466431431 in words is "fifty-one billion, four hundred sixty-six million, four hundred thirty-one thousand, four hundred thirty-one".