5181522621 has 48 divisors (see below), whose sum is σ = 7898386944. Its totient is φ = 3015936000.

The previous prime is 5181522617. The next prime is 5181522631. The reversal of 5181522621 is 1262251815.

It is not a de Polignac number, because 5181522621 - 2² = 5181522617 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181522631) 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 47 ways as a sum of consecutive naturals, for example, 1539981 + ... + 1543341.

It is an arithmetic number, because the mean of its divisors is an integer number (164549728).

Almost surely, 2^5181522621 is an apocalyptic number.

It is an amenable number.

5181522621 is a deficient number, since it is larger than the sum of its proper divisors (2716864323).

5181522621 is a wasteful number, since it uses less digits than its factorization.

5181522621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554 (or 3543 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 5181522621 is about 71982.7939232703. The cubic root of 5181522621 is about 1730.4237460884.

The spelling of 5181522621 in words is "five billion, one hundred eighty-one million, five hundred twenty-two thousand, six hundred twenty-one".