253401545521015 has 4 divisors (see below), whose sum is σ = 304081854625224. Its totient is φ = 202721236416808.

The previous prime is 253401545520973. The next prime is 253401545521027. The reversal of 253401545521015 is 510125545104352.

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

It is a cyclic number.

It is not a de Polignac number, because 253401545521015 - 2¹⁷ = 253401545389943 is a prime.

It is a super-3 number, since 3×253401545521015³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25340154552097 + ... + 25340154552106.

It is an arithmetic number, because the mean of its divisors is an integer number (76020463656306).

Almost surely, 2^{253401545521015} is an apocalyptic number.

253401545521015 is a deficient number, since it is larger than the sum of its proper divisors (50680309104209).

253401545521015 is an equidigital number, since it uses as much as digits as its factorization.

253401545521015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50680309104208.

The product of its (nonzero) digits is 600000, while the sum is 43.

The spelling of 253401545521015 in words is "two hundred fifty-three trillion, four hundred one billion, five hundred forty-five million, five hundred twenty-one thousand, fifteen".