253768451 has 4 divisors (see below), whose sum is σ = 253927392. Its totient is φ = 253609512.

The previous prime is 253768447. The next prime is 253768457. The reversal of 253768451 is 154867352.

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

It is a cyclic number.

It is not a de Polignac number, because 253768451 - 2² = 253768447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253768399 and 253768408.

It is not an unprimeable number, because it can be changed into a prime (253768457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77051 + ... + 80276.

It is an arithmetic number, because the mean of its divisors is an integer number (63481848).

Almost surely, 2^253768451 is an apocalyptic number.

253768451 is a deficient number, since it is larger than the sum of its proper divisors (158941).

253768451 is a wasteful number, since it uses less digits than its factorization.

253768451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158940.

The product of its digits is 201600, while the sum is 41.

The square root of 253768451 is about 15930.1114559817. Note that the first 3 decimals coincide. The cubic root of 253768451 is about 633.1100529327.

The spelling of 253768451 in words is "two hundred fifty-three million, seven hundred sixty-eight thousand, four hundred fifty-one".