51557029 has 2 divisors, whose sum is σ = 51557030. Its totient is φ = 51557028.

The previous prime is 51556991. The next prime is 51557057. The reversal of 51557029 is 92075515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42224004 + 9333025 = 6498^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 51557029 - 2⁹ = 51556517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51556985 and 51557003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51554029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25778514 + 25778515.

It is an arithmetic number, because the mean of its divisors is an integer number (25778515).

Almost surely, 2^51557029 is an apocalyptic number.

It is an amenable number.

51557029 is a deficient number, since it is larger than the sum of its proper divisors (1).

51557029 is an equidigital number, since it uses as much as digits as its factorization.

51557029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 51557029 is about 7180.3223465246. The cubic root of 51557029 is about 372.1882237241.

The spelling of 51557029 in words is "fifty-one million, five hundred fifty-seven thousand, twenty-nine".