51020929 has 2 divisors, whose sum is σ = 51020930. Its totient is φ = 51020928.

The previous prime is 51020887. The next prime is 51020993. The reversal of 51020929 is 92902015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49914225 + 1106704 = 7065^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 51020929 - 2¹¹ = 51018881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51020897 and 51020906.

It is not a weakly prime, because it can be changed into another prime (51020999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510464 + 25510465.

It is an arithmetic number, because the mean of its divisors is an integer number (25510465).

Almost surely, 2^51020929 is an apocalyptic number.

It is an amenable number.

51020929 is a deficient number, since it is larger than the sum of its proper divisors (1).

51020929 is an equidigital number, since it uses as much as digits as its factorization.

51020929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 51020929 is about 7142.8936013355. The cubic root of 51020929 is about 370.8936979150.

The spelling of 51020929 in words is "fifty-one million, twenty thousand, nine hundred twenty-nine".