51860651 has 2 divisors, whose sum is σ = 51860652. Its totient is φ = 51860650.

The previous prime is 51860639. The next prime is 51860689. The reversal of 51860651 is 15606815.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51860651 is a prime.

It is not a weakly prime, because it can be changed into another prime (51860621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25930325 + 25930326.

It is an arithmetic number, because the mean of its divisors is an integer number (25930326).

Almost surely, 2^51860651 is an apocalyptic number.

51860651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51860651 is an equidigital number, since it uses as much as digits as its factorization.

51860651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51860651 is about 7201.4339544288. The cubic root of 51860651 is about 372.9174060692.

The spelling of 51860651 in words is "fifty-one million, eight hundred sixty thousand, six hundred fifty-one".