253573157 has 4 divisors (see below), whose sum is σ = 257730156. Its totient is φ = 249416160.

The previous prime is 253573123. The next prime is 253573169. The reversal of 253573157 is 751375352.

253573157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61999876 + 191573281 = 7874^2 + 13841^2 .

It is a cyclic number.

It is not a de Polignac number, because 253573157 - 2⁶ = 253573093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253573157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253573057) 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, 2078408 + ... + 2078529.

It is an arithmetic number, because the mean of its divisors is an integer number (64432539).

Almost surely, 2^253573157 is an apocalyptic number.

It is an amenable number.

253573157 is a deficient number, since it is larger than the sum of its proper divisors (4156999).

253573157 is an equidigital number, since it uses as much as digits as its factorization.

253573157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156998.

The product of its digits is 110250, while the sum is 38.

The square root of 253573157 is about 15923.9805639168. The cubic root of 253573157 is about 632.9476025766.

The spelling of 253573157 in words is "two hundred fifty-three million, five hundred seventy-three thousand, one hundred fifty-seven".