253550557 has 8 divisors (see below), whose sum is σ = 274190840. Its totient is φ = 233072640.

The previous prime is 253550543. The next prime is 253550599. The reversal of 253550557 is 755055352.

It can be written as a sum of positive squares in 4 ways, for example, as 45441081 + 208109476 = 6741^2 + 14426^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 253550557 - 2²³ = 245161949 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 (253550527) 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, 37332 + ... + 43597.

It is an arithmetic number, because the mean of its divisors is an integer number (34273855).

Almost surely, 2^253550557 is an apocalyptic number.

It is an amenable number.

253550557 is a deficient number, since it is larger than the sum of its proper divisors (20640283).

253550557 is a wasteful number, since it uses less digits than its factorization.

253550557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81183.

The product of its (nonzero) digits is 131250, while the sum is 37.

The square root of 253550557 is about 15923.2709265402. The cubic root of 253550557 is about 632.9287979563.

The spelling of 253550557 in words is "two hundred fifty-three million, five hundred fifty thousand, five hundred fifty-seven".