253155990 has 16 divisors (see below), whose sum is σ = 607574448. Its totient is φ = 67508256.

The previous prime is 253155979. The next prime is 253155997. The reversal of 253155990 is 99551352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253155997) 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, 4219237 + ... + 4219296.

It is an arithmetic number, because the mean of its divisors is an integer number (37973403).

Almost surely, 2^253155990 is an apocalyptic number.

253155990 is an abundant number, since it is smaller than the sum of its proper divisors (354418458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253155990 is a wasteful number, since it uses less digits than its factorization.

253155990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438543.

The product of its (nonzero) digits is 60750, while the sum is 39.

The square root of 253155990 is about 15910.8764686299. The cubic root of 253155990 is about 632.6003132101.

The spelling of 253155990 in words is "two hundred fifty-three million, one hundred fifty-five thousand, nine hundred ninety".