51637511 has 2 divisors, whose sum is σ = 51637512. Its totient is φ = 51637510.

The previous prime is 51637501. The next prime is 51637513. The reversal of 51637511 is 11573615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51637511 - 2⁶ = 51637447 is a prime.

Together with 51637513, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3093392 and since 51637511 and 3093392 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51637513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25818755 + 25818756.

It is an arithmetic number, because the mean of its divisors is an integer number (25818756).

Almost surely, 2^51637511 is an apocalyptic number.

51637511 is a deficient number, since it is larger than the sum of its proper divisors (1).

51637511 is an equidigital number, since it uses as much as digits as its factorization.

51637511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 51637511 is about 7185.9245055873. The cubic root of 51637511 is about 372.3817885339.

The spelling of 51637511 in words is "fifty-one million, six hundred thirty-seven thousand, five hundred eleven".