253720234 has 4 divisors (see below), whose sum is σ = 380580354. Its totient is φ = 126860116.

The previous prime is 253720183. The next prime is 253720273. The reversal of 253720234 is 432027352.

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

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 93064609 = 12675^2 + 9647^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63430057 + ... + 63430060.

Almost surely, 2^253720234 is an apocalyptic number.

253720234 is a deficient number, since it is larger than the sum of its proper divisors (126860120).

253720234 is a wasteful number, since it uses less digits than its factorization.

253720234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126860119.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 253720234 is about 15928.5979922905. The cubic root of 253720234 is about 633.0699525960.

Adding to 253720234 its reverse (432027352), we get a palindrome (685747586).

The spelling of 253720234 in words is "two hundred fifty-three million, seven hundred twenty thousand, two hundred thirty-four".