51102331 has 4 divisors (see below), whose sum is σ = 58402672. Its totient is φ = 43801992.

The previous prime is 51102313. The next prime is 51102349. The reversal of 51102331 is 13320115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13320115 = 5 ⋅2664023.

It is an interprime number because it is at equal distance from previous prime (51102313) and next prime (51102349).

It is a cyclic number.

It is not a de Polignac number, because 51102331 - 2⁷ = 51102203 is a prime.

It is a super-2 number, since 2×51102331² = 5222896467267122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51102131) 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, 3650160 + ... + 3650173.

It is an arithmetic number, because the mean of its divisors is an integer number (14600668).

Almost surely, 2^51102331 is an apocalyptic number.

51102331 is a deficient number, since it is larger than the sum of its proper divisors (7300341).

51102331 is an equidigital number, since it uses as much as digits as its factorization.

51102331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300340.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 51102331 is about 7148.5894412814. The cubic root of 51102331 is about 371.0908421532.

Adding to 51102331 its reverse (13320115), we get a palindrome (64422446).

The spelling of 51102331 in words is "fifty-one million, one hundred two thousand, three hundred thirty-one".