130255021 has 16 divisors (see below), whose sum is σ = 142270128. Its totient is φ = 118540800.

The previous prime is 130255009. The next prime is 130255031. The reversal of 130255021 is 120552031.

It can be written as a sum of positive squares in 8 ways, for example, as 1999396 + 128255625 = 1414^2 + 11325^2 .

It is a 5-Lehmer number, since φ(130255021) divides (130255021-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 130255021 - 2¹¹ = 130252973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130255021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130255031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463401 + ... + 463681.

It is an arithmetic number, because the mean of its divisors is an integer number (8891883).

Almost surely, 2^130255021 is an apocalyptic number.

It is an amenable number.

130255021 is a deficient number, since it is larger than the sum of its proper divisors (12015107).

130255021 is a wasteful number, since it uses less digits than its factorization.

130255021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 130255021 is about 11412.9321823973. The cubic root of 130255021 is about 506.9107380069.

The spelling of 130255021 in words is "one hundred thirty million, two hundred fifty-five thousand, twenty-one".