253604505 has 48 divisors (see below), whose sum is σ = 509749632. Its totient is φ = 105388800.

The previous prime is 253604503. The next prime is 253604513. The reversal of 253604505 is 505406352.

It is not a de Polignac number, because 253604505 - 2¹ = 253604503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253604503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2725 + ... + 22685.

It is an arithmetic number, because the mean of its divisors is an integer number (10619784).

Almost surely, 2^253604505 is an apocalyptic number.

It is an amenable number.

253604505 is an abundant number, since it is smaller than the sum of its proper divisors (256145127).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253604505 is a wasteful number, since it uses less digits than its factorization.

253604505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19998 (or 19987 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 253604505 is about 15924.9648351260. The cubic root of 253604505 is about 632.9736842330.

The spelling of 253604505 in words is "two hundred fifty-three million, six hundred four thousand, five hundred five".