253640302 has 4 divisors (see below), whose sum is σ = 380460456. Its totient is φ = 126820150.

The previous prime is 253640279. The next prime is 253640333. The reversal of 253640302 is 203046352.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63410074 + ... + 63410077.

It is an arithmetic number, because the mean of its divisors is an integer number (95115114).

Almost surely, 2^253640302 is an apocalyptic number.

253640302 is a deficient number, since it is larger than the sum of its proper divisors (126820154).

253640302 is a wasteful number, since it uses less digits than its factorization.

253640302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126820153.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 253640302 is about 15926.0887225960. The cubic root of 253640302 is about 633.0034648461.

Adding to 253640302 its reverse (203046352), we get a palindrome (456686654).

The spelling of 253640302 in words is "two hundred fifty-three million, six hundred forty thousand, three hundred two".