51122331 has 72 divisors (see below), whose sum is σ = 88498800. Its totient is φ = 28304640.

The previous prime is 51122327. The next prime is 51122333. The reversal of 51122331 is 13322115.

It is not a de Polignac number, because 51122331 - 2² = 51122327 is a prime.

It is a super-2 number, since 2×51122331² = 5226985453747122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51122333) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 838041 + ... + 838101.

It is an arithmetic number, because the mean of its divisors is an integer number (1229150).

Almost surely, 2^51122331 is an apocalyptic number.

51122331 is a deficient number, since it is larger than the sum of its proper divisors (37376469).

51122331 is a wasteful number, since it uses less digits than its factorization.

51122331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 125 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 51122331 is about 7149.9881818084. The cubic root of 51122331 is about 371.1392473087.

Adding to 51122331 its reverse (13322115), we get a palindrome (64444446).

The spelling of 51122331 in words is "fifty-one million, one hundred twenty-two thousand, three hundred thirty-one".