253015403 has 12 divisors (see below), whose sum is σ = 270762840. Its totient is φ = 235612800.

The previous prime is 253015379. The next prime is 253015409. The reversal of 253015403 is 304510352.

It is not a de Polignac number, because 253015403 - 2¹⁰ = 253014379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253015409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172688 + ... + 174146.

It is an arithmetic number, because the mean of its divisors is an integer number (22563570).

Almost surely, 2^253015403 is an apocalyptic number.

253015403 is a deficient number, since it is larger than the sum of its proper divisors (17747437).

253015403 is a wasteful number, since it uses less digits than its factorization.

253015403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 253015403 is about 15906.4579023741. The cubic root of 253015403 is about 632.4831893130.

Adding to 253015403 its reverse (304510352), we get a palindrome (557525755).

The spelling of 253015403 in words is "two hundred fifty-three million, fifteen thousand, four hundred three".