215431252501 has 2 divisors, whose sum is σ = 215431252502. Its totient is φ = 215431252500.

The previous prime is 215431252457. The next prime is 215431252511. The reversal of 215431252501 is 105252134512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114227100625 + 101204151876 = 337975^2 + 318126^2 .

It is a cyclic number.

It is not a de Polignac number, because 215431252501 - 2¹⁷ = 215431121429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215431252511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107715626250 + 107715626251.

It is an arithmetic number, because the mean of its divisors is an integer number (107715626251).

Almost surely, 2^215431252501 is an apocalyptic number.

It is an amenable number.

215431252501 is a deficient number, since it is larger than the sum of its proper divisors (1).

215431252501 is an equidigital number, since it uses as much as digits as its factorization.

215431252501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 215431252501 in words is "two hundred fifteen billion, four hundred thirty-one million, two hundred fifty-two thousand, five hundred one".