51930157 has 2 divisors, whose sum is σ = 51930158. Its totient is φ = 51930156.

The previous prime is 51930127. The next prime is 51930163. The reversal of 51930157 is 75103915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 3721 = 7206^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51930157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51930127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25965078 + 25965079.

It is an arithmetic number, because the mean of its divisors is an integer number (25965079).

Almost surely, 2^51930157 is an apocalyptic number.

It is an amenable number.

51930157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51930157 is an equidigital number, since it uses as much as digits as its factorization.

51930157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 51930157 is about 7206.2581829962. The cubic root of 51930157 is about 373.0839319781.

The spelling of 51930157 in words is "fifty-one million, nine hundred thirty thousand, one hundred fifty-seven".