253669081 has 4 divisors (see below), whose sum is σ = 254944000. Its totient is φ = 252394164.

The previous prime is 253669069. The next prime is 253669109. The reversal of 253669081 is 180966352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253669081 - 2⁷ = 253668953 is a prime.

It is a super-3 number, since 3×253669081³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253669021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637161 + ... + 637558.

It is an arithmetic number, because the mean of its divisors is an integer number (63736000).

Almost surely, 2^253669081 is an apocalyptic number.

It is an amenable number.

253669081 is a deficient number, since it is larger than the sum of its proper divisors (1274919).

253669081 is a wasteful number, since it uses less digits than its factorization.

253669081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274918.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 253669081 is about 15926.9922144767. The cubic root of 253669081 is about 633.0274049398.

It can be divided in two parts, 2536 and 69081, that added together give a palindrome (71617).

The spelling of 253669081 in words is "two hundred fifty-three million, six hundred sixty-nine thousand, eighty-one".