51102155321 has 48 divisors (see below), whose sum is σ = 61799826816. Its totient is φ = 42099450624.

The previous prime is 51102155309. The next prime is 51102155333. The reversal of 51102155321 is 12355120115.

It is an interprime number because it is at equal distance from previous prime (51102155309) and next prime (51102155333).

It is not a de Polignac number, because 51102155321 - 2³⁴ = 33922286137 is a prime.

It is a super-2 number, since 2×51102155321² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51102155341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70291460 + ... + 70292186.

It is an arithmetic number, because the mean of its divisors is an integer number (1287496392).

Almost surely, 2^51102155321 is an apocalyptic number.

It is an amenable number.

51102155321 is a deficient number, since it is larger than the sum of its proper divisors (10697671495).

51102155321 is a wasteful number, since it uses less digits than its factorization.

51102155321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 51102155321 its reverse (12355120115), we get a palindrome (63457275436).

The spelling of 51102155321 in words is "fifty-one billion, one hundred two million, one hundred fifty-five thousand, three hundred twenty-one".