253455557 has 4 divisors (see below), whose sum is σ = 253511040. Its totient is φ = 253400076.

The previous prime is 253455541. The next prime is 253455577. The reversal of 253455557 is 755554352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253455557 - 2⁴ = 253455541 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 (253455577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20207 + ... + 30252.

It is an arithmetic number, because the mean of its divisors is an integer number (63377760).

Almost surely, 2^253455557 is an apocalyptic number.

It is an amenable number.

253455557 is a deficient number, since it is larger than the sum of its proper divisors (55483).

253455557 is an equidigital number, since it uses as much as digits as its factorization.

253455557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55482.

The product of its digits is 525000, while the sum is 41.

The square root of 253455557 is about 15920.2875916235. The cubic root of 253455557 is about 632.8497397628.

The spelling of 253455557 in words is "two hundred fifty-three million, four hundred fifty-five thousand, five hundred fifty-seven".