51358891 has 2 divisors, whose sum is σ = 51358892. Its totient is φ = 51358890.

The previous prime is 51358883. The next prime is 51358897. The reversal of 51358891 is 19885315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51358891 - 2³ = 51358883 is a prime.

It is not a weakly prime, because it can be changed into another prime (51358897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25679445 + 25679446.

It is an arithmetic number, because the mean of its divisors is an integer number (25679446).

Almost surely, 2^51358891 is an apocalyptic number.

51358891 is the 4533-rd centered pentagonal number.

51358891 is a deficient number, since it is larger than the sum of its proper divisors (1).

51358891 is an equidigital number, since it uses as much as digits as its factorization.

51358891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 40.

The square root of 51358891 is about 7166.5117735199. The cubic root of 51358891 is about 371.7108280915.

The spelling of 51358891 in words is "fifty-one million, three hundred fifty-eight thousand, eight hundred ninety-one".