253131402 has 8 divisors (see below), whose sum is σ = 506262816. Its totient is φ = 84377132.

The previous prime is 253131391. The next prime is 253131409. The reversal of 253131402 is 204131352.

It is a sphenic number, since it is the product of 3 distinct primes.

253131402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (253131409) 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, 21094278 + ... + 21094289.

It is an arithmetic number, because the mean of its divisors is an integer number (63282852).

Almost surely, 2^253131402 is an apocalyptic number.

253131402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

253131402 is a wasteful number, since it uses less digits than its factorization.

253131402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42188572.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 253131402 is about 15910.1037708747. The cubic root of 253131402 is about 632.5798319249.

Adding to 253131402 its reverse (204131352), we get a palindrome (457262754).

Subtracting from 253131402 its reverse (204131352), we obtain a triangular number (49000050 = T₉₈₉₉).

It can be divided in two parts, 2531 and 31402, that added together give a palindrome (33933).

The spelling of 253131402 in words is "two hundred fifty-three million, one hundred thirty-one thousand, four hundred two".