51162169 has 2 divisors, whose sum is σ = 51162170. Its totient is φ = 51162168.

The previous prime is 51162151. The next prime is 51162173. The reversal of 51162169 is 96126115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40793769 + 10368400 = 6387^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 51162169 - 2¹⁵ = 51129401 is a prime.

It is a super-2 number, since 2×51162169² = 5235135073569122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51162169.

It is not a weakly prime, because it can be changed into another prime (51162109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25581084 + 25581085.

It is an arithmetic number, because the mean of its divisors is an integer number (25581085).

Almost surely, 2^51162169 is an apocalyptic number.

It is an amenable number.

51162169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51162169 is an equidigital number, since it uses as much as digits as its factorization.

51162169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 51162169 is about 7152.7735180138. The cubic root of 51162169 is about 371.2356279320.

Adding to 51162169 its product of digits (3240), we get a square (51165409 = 7153²).

The spelling of 51162169 in words is "fifty-one million, one hundred sixty-two thousand, one hundred sixty-nine".