51153123531 has 16 divisors (see below), whose sum is σ = 68298370560. Its totient is φ = 34055017920.

The previous prime is 51153123503. The next prime is 51153123569. The reversal of 51153123531 is 13532135115.

It is not a de Polignac number, because 51153123531 - 2¹⁰ = 51153122507 is a prime.

It is a super-2 number, since 2×51153123531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51153128531) 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, 8079175 + ... + 8085503.

It is an arithmetic number, because the mean of its divisors is an integer number (4268648160).

Almost surely, 2^51153123531 is an apocalyptic number.

51153123531 is a deficient number, since it is larger than the sum of its proper divisors (17145247029).

51153123531 is a wasteful number, since it uses less digits than its factorization.

51153123531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626.

The product of its digits is 6750, while the sum is 30.

Adding to 51153123531 its reverse (13532135115), we get a palindrome (64685258646).

The spelling of 51153123531 in words is "fifty-one billion, one hundred fifty-three million, one hundred twenty-three thousand, five hundred thirty-one".