253721252 has 6 divisors (see below), whose sum is σ = 444012198. Its totient is φ = 126860624.

The previous prime is 253721249. The next prime is 253721297. The reversal of 253721252 is 252127352.

It can be written as a sum of positive squares in only one way, i.e., 138674176 + 115047076 = 11776^2 + 10726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31715153 + ... + 31715160.

It is an arithmetic number, because the mean of its divisors is an integer number (74002033).

Almost surely, 2^253721252 is an apocalyptic number.

It is an amenable number.

253721252 is a deficient number, since it is larger than the sum of its proper divisors (190290946).

253721252 is a wasteful number, since it uses less digits than its factorization.

253721252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63430317 (or 63430315 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 253721252 is about 15928.6299473621. The cubic root of 253721252 is about 633.0707992823.

The spelling of 253721252 in words is "two hundred fifty-three million, seven hundred twenty-one thousand, two hundred fifty-two".