51890357 has 2 divisors, whose sum is σ = 51890358. Its totient is φ = 51890356.

The previous prime is 51890351. The next prime is 51890359. The reversal of 51890357 is 75309815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44702596 + 7187761 = 6686^2 + 2681^2 .

It is a cyclic number.

It is not a de Polignac number, because 51890357 - 2²² = 47696053 is a prime.

Together with 51890359, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51890357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51890351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25945178 + 25945179.

It is an arithmetic number, because the mean of its divisors is an integer number (25945179).

Almost surely, 2^51890357 is an apocalyptic number.

It is an amenable number.

51890357 is a deficient number, since it is larger than the sum of its proper divisors (1).

51890357 is an equidigital number, since it uses as much as digits as its factorization.

51890357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 51890357 is about 7203.4961650576. The cubic root of 51890357 is about 372.9885953670.

The spelling of 51890357 in words is "fifty-one million, eight hundred ninety thousand, three hundred fifty-seven".