253705506 has 8 divisors (see below), whose sum is σ = 507411024. Its totient is φ = 84568500.

The previous prime is 253705489. The next prime is 253705513. The reversal of 253705506 is 605507352.

253705506 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

253705506 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21142120 + ... + 21142131.

It is an arithmetic number, because the mean of its divisors is an integer number (63426378).

Almost surely, 2^253705506 is an apocalyptic number.

253705506 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.

253705506 is a wasteful number, since it uses less digits than its factorization.

253705506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42284256.

The product of its (nonzero) digits is 31500, while the sum is 33.

The square root of 253705506 is about 15928.1356724508. The cubic root of 253705506 is about 633.0577028376.

It can be divided in two parts, 25370 and 5506, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 253705506 in words is "two hundred fifty-three million, seven hundred five thousand, five hundred six".