253311905 has 32 divisors (see below), whose sum is σ = 387072000. Its totient is φ = 154537920.

The previous prime is 253311887. The next prime is 253311913. The reversal of 253311905 is 509113352.

It is not a de Polignac number, because 253311905 - 2¹⁴ = 253295521 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11096 + ... + 25094.

It is an arithmetic number, because the mean of its divisors is an integer number (12096000).

Almost surely, 2^253311905 is an apocalyptic number.

It is an amenable number.

253311905 is a deficient number, since it is larger than the sum of its proper divisors (133760095).

253311905 is a wasteful number, since it uses less digits than its factorization.

253311905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14069.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 253311905 is about 15915.7753502618. The cubic root of 253311905 is about 632.7301562581.

The spelling of 253311905 in words is "two hundred fifty-three million, three hundred eleven thousand, nine hundred five".