51023657 has 2 divisors, whose sum is σ = 51023658. Its totient is φ = 51023656.

The previous prime is 51023597. The next prime is 51023659. The reversal of 51023657 is 75632015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33223696 + 17799961 = 5764^2 + 4219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51023657 is a prime.

Together with 51023659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51023659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511828 + 25511829.

It is an arithmetic number, because the mean of its divisors is an integer number (25511829).

Almost surely, 2^51023657 is an apocalyptic number.

It is an amenable number.

51023657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023657 is an equidigital number, since it uses as much as digits as its factorization.

51023657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 51023657 is about 7143.0845578083. The cubic root of 51023657 is about 370.9003081434.

The spelling of 51023657 in words is "fifty-one million, twenty-three thousand, six hundred fifty-seven".