253661550 has 48 divisors (see below), whose sum is σ = 650784240. Its totient is φ = 65309440.

The previous prime is 253661543. The next prime is 253661557. The reversal of 253661550 is 55166352.

It is an interprime number because it is at equal distance from previous prime (253661543) and next prime (253661557).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253661557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24807 + ... + 33506.

It is an arithmetic number, because the mean of its divisors is an integer number (13558005).

Almost surely, 2^253661550 is an apocalyptic number.

253661550 is an abundant number, since it is smaller than the sum of its proper divisors (397122690).

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

253661550 is a wasteful number, since it uses less digits than its factorization.

253661550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58357 (or 58352 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 253661550 is about 15926.7557901790. The cubic root of 253661550 is about 633.0211403784.

The spelling of 253661550 in words is "two hundred fifty-three million, six hundred sixty-one thousand, five hundred fifty".