523136121553 has 4 divisors (see below), whose sum is σ = 523169494128. Its totient is φ = 523102748980.

The previous prime is 523136121523. The next prime is 523136121581. The reversal of 523136121553 is 355121631325.

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 a de Polignac number, because none of the positive numbers 2^k-523136121553 is a prime.

It is a super-2 number, since 2×523136121553² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523136121523) 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, 16662763 + ... + 16694128.

It is an arithmetic number, because the mean of its divisors is an integer number (130792373532).

Almost surely, 2^523136121553 is an apocalyptic number.

It is an amenable number.

523136121553 is a deficient number, since it is larger than the sum of its proper divisors (33372575).

523136121553 is a wasteful number, since it uses less digits than its factorization.

523136121553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33372574.

The product of its digits is 81000, while the sum is 37.

Adding to 523136121553 its reverse (355121631325), we get a palindrome (878257752878).

The spelling of 523136121553 in words is "five hundred twenty-three billion, one hundred thirty-six million, one hundred twenty-one thousand, five hundred fifty-three".