51767501 has 2 divisors, whose sum is σ = 51767502. Its totient is φ = 51767500.

The previous prime is 51767497. The next prime is 51767531. The reversal of 51767501 is 10576715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47251876 + 4515625 = 6874^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 51767501 - 2² = 51767497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51767531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25883750 + 25883751.

It is an arithmetic number, because the mean of its divisors is an integer number (25883751).

Almost surely, 2^51767501 is an apocalyptic number.

It is an amenable number.

51767501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51767501 is an equidigital number, since it uses as much as digits as its factorization.

51767501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 51767501 is about 7194.9635857313. The cubic root of 51767501 is about 372.6939992128.

The spelling of 51767501 in words is "fifty-one million, seven hundred sixty-seven thousand, five hundred one".