51162541231 has 4 divisors (see below), whose sum is σ = 51164406352. Its totient is φ = 51160676112.

The previous prime is 51162541201. The next prime is 51162541271. The reversal of 51162541231 is 13214526115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51162541231 is a prime.

It is a super-2 number, since 2×51162541231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51162541193 and 51162541202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51162541201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890790 + ... + 946483.

It is an arithmetic number, because the mean of its divisors is an integer number (12791101588).

Almost surely, 2^51162541231 is an apocalyptic number.

51162541231 is a deficient number, since it is larger than the sum of its proper divisors (1865121).

51162541231 is a wasteful number, since it uses less digits than its factorization.

51162541231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865120.

The product of its digits is 7200, while the sum is 31.

The spelling of 51162541231 in words is "fifty-one billion, one hundred sixty-two million, five hundred forty-one thousand, two hundred thirty-one".