253531521312 has 48 divisors (see below), whose sum is σ = 665571312000. Its totient is φ = 84504022272.

The previous prime is 253531521293. The next prime is 253531521361. The reversal of 253531521312 is 213125135352.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×253531521312² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1249578 + ... + 1438230.

It is an arithmetic number, because the mean of its divisors is an integer number (13866069000).

Almost surely, 2^253531521312 is an apocalyptic number.

It is an amenable number.

253531521312 is an abundant number, since it is smaller than the sum of its proper divisors (412039790688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253531521312 is a wasteful number, since it uses less digits than its factorization.

253531521312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202665 (or 202657 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

Adding to 253531521312 its reverse (213125135352), we get a palindrome (466656656664).

The spelling of 253531521312 in words is "two hundred fifty-three billion, five hundred thirty-one million, five hundred twenty-one thousand, three hundred twelve".