51492289 has 2 divisors, whose sum is σ = 51492290. Its totient is φ = 51492288.

The previous prime is 51492281. The next prime is 51492293. The reversal of 51492289 is 98229415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 11664 = 7175^2 + 108^2 .

It is a cyclic number.

It is not a de Polignac number, because 51492289 - 2³ = 51492281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51492281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746144 + 25746145.

It is an arithmetic number, because the mean of its divisors is an integer number (25746145).

Almost surely, 2^51492289 is an apocalyptic number.

It is an amenable number.

51492289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51492289 is an equidigital number, since it uses as much as digits as its factorization.

51492289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 51492289 is about 7175.8127762644. The cubic root of 51492289 is about 372.0323732762.

The spelling of 51492289 in words is "fifty-one million, four hundred ninety-two thousand, two hundred eighty-nine".