51501829 has 2 divisors, whose sum is σ = 51501830. Its totient is φ = 51501828.

The previous prime is 51501811. The next prime is 51501833. The reversal of 51501829 is 92810515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29430625 + 22071204 = 5425^2 + 4698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51501829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51501829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51501839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750914 + 25750915.

It is an arithmetic number, because the mean of its divisors is an integer number (25750915).

Almost surely, 2^51501829 is an apocalyptic number.

It is an amenable number.

51501829 is a deficient number, since it is larger than the sum of its proper divisors (1).

51501829 is an equidigital number, since it uses as much as digits as its factorization.

51501829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 51501829 is about 7176.4774785406. The cubic root of 51501829 is about 372.0553473936.

The spelling of 51501829 in words is "fifty-one million, five hundred one thousand, eight hundred twenty-nine".