5551261521 has 32 divisors (see below), whose sum is σ = 8397312000. Its totient is φ = 3233763648.

The previous prime is 5551261511. The next prime is 5551261523. The reversal of 5551261521 is 1251621555.

It is not a de Polignac number, because 5551261521 - 2¹⁰ = 5551260497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5551261523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1301290 + ... + 1305548.

It is an arithmetic number, because the mean of its divisors is an integer number (262416000).

Almost surely, 2^5551261521 is an apocalyptic number.

It is an amenable number.

5551261521 is a deficient number, since it is larger than the sum of its proper divisors (2846050479).

5551261521 is a wasteful number, since it uses less digits than its factorization.

5551261521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6053.

The product of its digits is 15000, while the sum is 33.

The square root of 5551261521 is about 74506.7884222639. The cubic root of 5551261521 is about 1770.6411884277.

The spelling of 5551261521 in words is "five billion, five hundred fifty-one million, two hundred sixty-one thousand, five hundred twenty-one".