545512312521 has 32 divisors (see below), whose sum is σ = 881721469440. Its totient is φ = 330581494800.

The previous prime is 545512312519. The next prime is 545512312523. The reversal of 545512312521 is 125213215545.

545512312521 is a `hidden beast` number, since 5 + 4 + 5 + 5 + 123 + 1 + 2 + 521 = 666.

It is an interprime number because it is at equal distance from previous prime (545512312519) and next prime (545512312523).

It is not a de Polignac number, because 545512312521 - 2¹ = 545512312519 is a prime.

It is a super-2 number, since 2×545512312521² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (545512312523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3184426 + ... + 3351356.

It is an arithmetic number, because the mean of its divisors is an integer number (27553795920).

Almost surely, 2^545512312521 is an apocalyptic number.

It is an amenable number.

545512312521 is a deficient number, since it is larger than the sum of its proper divisors (336209156919).

545512312521 is a wasteful number, since it uses less digits than its factorization.

545512312521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177954 (or 177948 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The spelling of 545512312521 in words is "five hundred forty-five billion, five hundred twelve million, three hundred twelve thousand, five hundred twenty-one".