51492257 has 2 divisors, whose sum is σ = 51492258. Its totient is φ = 51492256.

The previous prime is 51492173. The next prime is 51492281. The reversal of 51492257 is 75229415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44142736 + 7349521 = 6644^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 51492257 - 2¹² = 51488161 is a prime.

It is not a weakly prime, because it can be changed into another prime (51492157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25746128 + 25746129.

It is an arithmetic number, because the mean of its divisors is an integer number (25746129).

Almost surely, 2^51492257 is an apocalyptic number.

It is an amenable number.

51492257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51492257 is an equidigital number, since it uses as much as digits as its factorization.

51492257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 51492257 is about 7175.8105465515. The cubic root of 51492257 is about 372.0322962094.

The spelling of 51492257 in words is "fifty-one million, four hundred ninety-two thousand, two hundred fifty-seven".