253551 has 8 divisors (see below), whose sum is σ = 340480. Its totient is φ = 167832.

The previous prime is 253543. The next prime is 253553. The reversal of 253551 is 155352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253551 - 2³ = 253543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253553) 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, 480 + ... + 858.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2²⁵³⁵⁵¹ is an apocalyptic number.

253551 is a deficient number, since it is larger than the sum of its proper divisors (86929).

253551 is a wasteful number, since it uses less digits than its factorization.

253551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 750, while the sum is 21.

The square root of 253551 is about 503.5384791652. The cubic root of 253551 is about 63.2929166571.

The spelling of 253551 in words is "two hundred fifty-three thousand, five hundred fifty-one".