51120331 has 2 divisors, whose sum is σ = 51120332. Its totient is φ = 51120330.

The previous prime is 51120323. The next prime is 51120341. The reversal of 51120331 is 13302115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51120331 - 2³ = 51120323 is a prime.

It is a super-2 number, since 2×51120331² = 5226576483099122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51120341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25560165 + 25560166.

It is an arithmetic number, because the mean of its divisors is an integer number (25560166).

Almost surely, 2^51120331 is an apocalyptic number.

51120331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51120331 is an equidigital number, since it uses as much as digits as its factorization.

51120331 is an evil number, because the sum of its binary digits is even.

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

The square root of 51120331 is about 7149.8483200695. The cubic root of 51120331 is about 371.1344073613.

Adding to 51120331 its reverse (13302115), we get a palindrome (64422446).

The spelling of 51120331 in words is "fifty-one million, one hundred twenty thousand, three hundred thirty-one".