51115357 has 2 divisors, whose sum is σ = 51115358. Its totient is φ = 51115356.

The previous prime is 51115331. The next prime is 51115369. The reversal of 51115357 is 75351115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 264196 = 7131^2 + 514^2 .

It is a cyclic number.

It is not a de Polignac number, because 51115357 - 2¹⁹ = 50591069 is a prime.

It is a super-2 number, since 2×51115357² = 5225559442474898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51115327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25557678 + 25557679.

It is an arithmetic number, because the mean of its divisors is an integer number (25557679).

Almost surely, 2^51115357 is an apocalyptic number.

It is an amenable number.

51115357 is a deficient number, since it is larger than the sum of its proper divisors (1).

51115357 is an equidigital number, since it uses as much as digits as its factorization.

51115357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2625, while the sum is 28.

The square root of 51115357 is about 7149.5004720610. The cubic root of 51115357 is about 371.1223698648.

The spelling of 51115357 in words is "fifty-one million, one hundred fifteen thousand, three hundred fifty-seven".