250509213 has 8 divisors (see below), whose sum is σ = 371124800. Its totient is φ = 167006124.

The previous prime is 250509199. The next prime is 250509269. The reversal of 250509213 is 312905052.

It is not a de Polignac number, because 250509213 - 2⁴ = 250509197 is a prime.

It is a super-3 number, since 3×250509213³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9278119 = 250509213 / (2 + 5 + 0 + 5 + 0 + 9 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250509313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4639033 + ... + 4639086.

It is an arithmetic number, because the mean of its divisors is an integer number (46390600).

Almost surely, 2^250509213 is an apocalyptic number.

It is an amenable number.

250509213 is a deficient number, since it is larger than the sum of its proper divisors (120615587).

250509213 is an equidigital number, since it uses as much as digits as its factorization.

250509213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9278128 (or 9278122 counting only the distinct ones).

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

The square root of 250509213 is about 15827.4828384048. The cubic root of 250509213 is about 630.3879469986.

The spelling of 250509213 in words is "two hundred fifty million, five hundred nine thousand, two hundred thirteen".