52157797 has 2 divisors, whose sum is σ = 52157798. Its totient is φ = 52157796.

The previous prime is 52157789. The next prime is 52157801. The reversal of 52157797 is 79775125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 231361 = 7206^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 52157797 - 2³ = 52157789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52157197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26078898 + 26078899.

It is an arithmetic number, because the mean of its divisors is an integer number (26078899).

Almost surely, 2^52157797 is an apocalyptic number.

It is an amenable number.

52157797 is a deficient number, since it is larger than the sum of its proper divisors (1).

52157797 is an equidigital number, since it uses as much as digits as its factorization.

52157797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 154350, while the sum is 43.

The square root of 52157797 is about 7222.0355163901. The cubic root of 52157797 is about 373.6282851059.

The spelling of 52157797 in words is "fifty-two million, one hundred fifty-seven thousand, seven hundred ninety-seven".