52515997 has 2 divisors, whose sum is σ = 52515998. Its totient is φ = 52515996.

The previous prime is 52515979. The next prime is 52516003. The reversal of 52515997 is 79951525.

It is a happy number.

Together with previous prime (52515979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42850116 + 9665881 = 6546^2 + 3109^2 .

It is a cyclic number.

It is not a de Polignac number, because 52515997 - 2²³ = 44127389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52515917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26257998 + 26257999.

It is an arithmetic number, because the mean of its divisors is an integer number (26257999).

Almost surely, 2^52515997 is an apocalyptic number.

It is an amenable number.

52515997 is a deficient number, since it is larger than the sum of its proper divisors (1).

52515997 is an equidigital number, since it uses as much as digits as its factorization.

52515997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141750, while the sum is 43.

The square root of 52515997 is about 7246.7921868921. The cubic root of 52515997 is about 374.4816470834.

Subtracting 52515997 from its reverse (79951525), we obtain a triangular number (27435528 = T₇₄₀₇).

The spelling of 52515997 in words is "fifty-two million, five hundred fifteen thousand, nine hundred ninety-seven".