252215129 has 2 divisors, whose sum is σ = 252215130. Its totient is φ = 252215128.

The previous prime is 252215107. The next prime is 252215141. The reversal of 252215129 is 921512252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178169104 + 74046025 = 13348^2 + 8605^2 .

It is a cyclic number.

It is not a de Polignac number, because 252215129 - 2¹² = 252211033 is a prime.

It is a super-2 number, since 2×252215129² = 127224942592973282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252215189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126107564 + 126107565.

It is an arithmetic number, because the mean of its divisors is an integer number (126107565).

Almost surely, 2^252215129 is an apocalyptic number.

It is an amenable number.

252215129 is a deficient number, since it is larger than the sum of its proper divisors (1).

252215129 is an equidigital number, since it uses as much as digits as its factorization.

252215129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 252215129 is about 15881.2823474680. The cubic root of 252215129 is about 631.8156483417.

The spelling of 252215129 in words is "two hundred fifty-two million, two hundred fifteen thousand, one hundred twenty-nine".