51121579 has 2 divisors, whose sum is σ = 51121580. Its totient is φ = 51121578.

The previous prime is 51121561. The next prime is 51121583. The reversal of 51121579 is 97512115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51121579 - 2⁷ = 51121451 is a prime.

It is a super-2 number, since 2×51121579² = 5226831678906482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51121579.

It is not a weakly prime, because it can be changed into another prime (51121529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25560789 + 25560790.

It is an arithmetic number, because the mean of its divisors is an integer number (25560790).

Almost surely, 2^51121579 is an apocalyptic number.

51121579 is a deficient number, since it is larger than the sum of its proper divisors (1).

51121579 is an equidigital number, since it uses as much as digits as its factorization.

51121579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 31.

The square root of 51121579 is about 7149.9355941155. The cubic root of 51121579 is about 371.1374275033.

The spelling of 51121579 in words is "fifty-one million, one hundred twenty-one thousand, five hundred seventy-nine".