253720266 has 8 divisors (see below), whose sum is σ = 507440544. Its totient is φ = 84573420.

The previous prime is 253720183. The next prime is 253720273. The reversal of 253720266 is 662027352.

It is a happy number.

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

253720266 is an admirable number.

It is a super-2 number, since 2×253720266² = 128747946758221512, which contains 22 as substring.

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, 21143350 + ... + 21143361.

It is an arithmetic number, because the mean of its divisors is an integer number (63430068).

Almost surely, 2^253720266 is an apocalyptic number.

253720266 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.

253720266 is a wasteful number, since it uses less digits than its factorization.

253720266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42286716.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 253720266 is about 15928.5989967731. The cubic root of 253720266 is about 633.0699792109.

The spelling of 253720266 in words is "two hundred fifty-three million, seven hundred twenty thousand, two hundred sixty-six".