521325124551 has 48 divisors (see below), whose sum is σ = 950147976960. Its totient is φ = 267555346560.

The previous prime is 521325124519. The next prime is 521325124559. The reversal of 521325124551 is 155421523125.

521325124551 is a `hidden beast` number, since 5 + 2 + 1 + 32 + 51 + 24 + 551 = 666.

It is not a de Polignac number, because 521325124551 - 2⁵ = 521325124519 is a prime.

It is a super-4 number, since 4×521325124551⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521325124559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4474246 + ... + 4589283.

It is an arithmetic number, because the mean of its divisors is an integer number (19794749520).

Almost surely, 2^521325124551 is an apocalyptic number.

521325124551 is a deficient number, since it is larger than the sum of its proper divisors (428822852409).

521325124551 is a wasteful number, since it uses less digits than its factorization.

521325124551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9063636 (or 9063633 counting only the distinct ones).

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

Adding to 521325124551 its reverse (155421523125), we get a palindrome (676746647676).

The spelling of 521325124551 in words is "five hundred twenty-one billion, three hundred twenty-five million, one hundred twenty-four thousand, five hundred fifty-one".