5051221520 has 20 divisors (see below), whose sum is σ = 11744090220. Its totient is φ = 2020488576.

The previous prime is 5051221517. The next prime is 5051221529. The reversal of 5051221520 is 251221505.

It can be written as a sum of positive squares in 2 ways, for example, as 950612224 + 4100609296 = 30832^2 + 64036^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×5051221520² = 51029677688222220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5051221529) 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, 31570055 + ... + 31570214.

It is an arithmetic number, because the mean of its divisors is an integer number (587204511).

Almost surely, 2^5051221520 is an apocalyptic number.

It is an amenable number.

5051221520 is an abundant number, since it is smaller than the sum of its proper divisors (6692868700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5051221520 is a wasteful number, since it uses less digits than its factorization.

5051221520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63140282 (or 63140276 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 5051221520 is about 71071.9460828251. The cubic root of 5051221520 is about 1715.7952911170.

The spelling of 5051221520 in words is "five billion, fifty-one million, two hundred twenty-one thousand, five hundred twenty".