215090253 has 18 divisors (see below), whose sum is σ = 361410894. Its totient is φ = 122908464.

The previous prime is 215090251. The next prime is 215090263. The reversal of 215090253 is 352090512.

It can be written as a sum of positive squares in only one way, i.e., 214856964 + 233289 = 14658^2 + 483^2 .

It is not a de Polignac number, because 215090253 - 2¹ = 215090251 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215090251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 243426 + ... + 244307.

It is an arithmetic number, because the mean of its divisors is an integer number (20078383).

Almost surely, 2^215090253 is an apocalyptic number.

It is an amenable number.

215090253 is a deficient number, since it is larger than the sum of its proper divisors (146320641).

215090253 is a wasteful number, since it uses less digits than its factorization.

215090253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487753 (or 487743 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 215090253 is about 14665.9555774590. The cubic root of 215090253 is about 599.1564562791.

The spelling of 215090253 in words is "two hundred fifteen million, ninety thousand, two hundred fifty-three".