253413621 has 12 divisors (see below), whose sum is σ = 385307520. Its totient is φ = 160050600.

The previous prime is 253413607. The next prime is 253413637. The reversal of 253413621 is 126314352.

253413621 is a `hidden beast` number, since 2 + 5 + 34 + 1 + 3 + 621 = 666.

It is not a de Polignac number, because 253413621 - 2⁹ = 253413109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253413521) 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, 740805 + ... + 741146.

It is an arithmetic number, because the mean of its divisors is an integer number (32108960).

Almost surely, 2^253413621 is an apocalyptic number.

It is an amenable number.

253413621 is a deficient number, since it is larger than the sum of its proper divisors (131893899).

253413621 is a wasteful number, since it uses less digits than its factorization.

253413621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481976 (or 1481973 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 253413621 is about 15918.9704755050. The cubic root of 253413621 is about 632.8148346946.

Adding to 253413621 its reverse (126314352), we get a palindrome (379727973).

The spelling of 253413621 in words is "two hundred fifty-three million, four hundred thirteen thousand, six hundred twenty-one".