51654021051 has 32 divisors (see below), whose sum is σ = 72237787200. Its totient is φ = 32800204800.

The previous prime is 51654021037. The next prime is 51654021073. The reversal of 51654021051 is 15012045615.

It is not a de Polignac number, because 51654021051 - 2¹¹ = 51654019003 is a prime.

It is a super-2 number, since 2×51654021051² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51654020051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 971895 + ... + 1023663.

It is an arithmetic number, because the mean of its divisors is an integer number (2257430850).

Almost surely, 2^51654021051 is an apocalyptic number.

51654021051 is a deficient number, since it is larger than the sum of its proper divisors (20583766149).

51654021051 is a wasteful number, since it uses less digits than its factorization.

51654021051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51999.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 51654021051 its reverse (15012045615), we get a palindrome (66666066666).

The spelling of 51654021051 in words is "fifty-one billion, six hundred fifty-four million, twenty-one thousand, fifty-one".