253515001 has 4 divisors (see below), whose sum is σ = 253552500. Its totient is φ = 253477504.

The previous prime is 253514981. The next prime is 253515019. The reversal of 253515001 is 100515352.

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 37454400 + 216060601 = 6120^2 + 14699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253515001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253515091) 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, 5476 + ... + 23173.

It is an arithmetic number, because the mean of its divisors is an integer number (63388125).

Almost surely, 2^253515001 is an apocalyptic number.

It is an amenable number.

253515001 is a deficient number, since it is larger than the sum of its proper divisors (37499).

253515001 is an equidigital number, since it uses as much as digits as its factorization.

253515001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37498.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 253515001 is about 15922.1544082451. The cubic root of 253515001 is about 632.8992108677.

The spelling of 253515001 in words is "two hundred fifty-three million, five hundred fifteen thousand, one".