252172571537 has 2 divisors, whose sum is σ = 252172571538. Its totient is φ = 252172571536.

The previous prime is 252172571461. The next prime is 252172571557. The reversal of 252172571537 is 735175271252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240751160896 + 11421410641 = 490664^2 + 106871^2 .

It is a cyclic number.

It is not a de Polignac number, because 252172571537 - 2⁸ = 252172571281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252172571491 and 252172571500.

It is not a weakly prime, because it can be changed into another prime (252172571557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126086285768 + 126086285769.

It is an arithmetic number, because the mean of its divisors is an integer number (126086285769).

Almost surely, 2^252172571537 is an apocalyptic number.

It is an amenable number.

252172571537 is a deficient number, since it is larger than the sum of its proper divisors (1).

252172571537 is an equidigital number, since it uses as much as digits as its factorization.

252172571537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1029000, while the sum is 47.

The spelling of 252172571537 in words is "two hundred fifty-two billion, one hundred seventy-two million, five hundred seventy-one thousand, five hundred thirty-seven".