253720234575 has 30 divisors (see below), whose sum is σ = 469977583944. Its totient is φ = 135317457360.

The previous prime is 253720234571. The next prime is 253720234597. The reversal of 253720234575 is 575432027352.

It is a happy number.

253720234575 is a `hidden beast` number, since 2 + 5 + 3 + 72 + 0 + 2 + 3 + 4 + 575 = 666.

It is not a de Polignac number, because 253720234575 - 2² = 253720234571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253720234575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253720234571) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 62644947 + ... + 62648996.

Almost surely, 2^253720234575 is an apocalyptic number.

253720234575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

253720234575 is a deficient number, since it is larger than the sum of its proper divisors (216257349369).

253720234575 is a wasteful number, since it uses less digits than its factorization.

253720234575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125293965 (or 125293951 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 45.

The spelling of 253720234575 in words is "two hundred fifty-three billion, seven hundred twenty million, two hundred thirty-four thousand, five hundred seventy-five".