51911129 has 2 divisors, whose sum is σ = 51911130. Its totient is φ = 51911128.

The previous prime is 51911113. The next prime is 51911213. The reversal of 51911129 is 92111915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45535504 + 6375625 = 6748^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 51911129 - 2⁴ = 51911113 is a prime.

It is not a weakly prime, because it can be changed into another prime (51911029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25955564 + 25955565.

It is an arithmetic number, because the mean of its divisors is an integer number (25955565).

Almost surely, 2^51911129 is an apocalyptic number.

It is an amenable number.

51911129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51911129 is an equidigital number, since it uses as much as digits as its factorization.

51911129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 29.

The square root of 51911129 is about 7204.9378206894. The cubic root of 51911129 is about 373.0383585341.

The spelling of 51911129 in words is "fifty-one million, nine hundred eleven thousand, one hundred twenty-nine".