253205523423 has 16 divisors (see below), whose sum is σ = 391428829440. Its totient is φ = 161464391352.

The previous prime is 253205523293. The next prime is 253205523449. The reversal of 253205523423 is 324325502352.

253205523423 is a `hidden beast` number, since 2 + 5 + 3 + 205 + 5 + 23 + 423 = 666.

It is not a de Polignac number, because 253205523423 - 2¹⁰ = 253205522399 is a prime.

It is a super-2 number, since 2×253205523423² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253205523023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203868561 + ... + 203869802.

It is an arithmetic number, because the mean of its divisors is an integer number (24464301840).

Almost surely, 2^253205523423 is an apocalyptic number.

253205523423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

253205523423 is a deficient number, since it is larger than the sum of its proper divisors (138223306017).

253205523423 is a wasteful number, since it uses less digits than its factorization.

253205523423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407738395 (or 407738389 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 36.

The spelling of 253205523423 in words is "two hundred fifty-three billion, two hundred five million, five hundred twenty-three thousand, four hundred twenty-three".