130215621 has 16 divisors (see below), whose sum is σ = 176774400. Its totient is φ = 85245888.

The previous prime is 130215611. The next prime is 130215667. The reversal of 130215621 is 126512031.

It is not a de Polignac number, because 130215621 - 2¹⁰ = 130214597 is a prime.

It is a super-2 number, since 2×130215621² = 33912215904831282, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130215601) 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, 45295 + ... + 48083.

It is an arithmetic number, because the mean of its divisors is an integer number (11048400).

Almost surely, 2^130215621 is an apocalyptic number.

It is an amenable number.

130215621 is a deficient number, since it is larger than the sum of its proper divisors (46558779).

130215621 is a wasteful number, since it uses less digits than its factorization.

130215621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 130215621 is about 11411.2059397769. The cubic root of 130215621 is about 506.8596221343.

Adding to 130215621 its reverse (126512031), we get a palindrome (256727652).

The spelling of 130215621 in words is "one hundred thirty million, two hundred fifteen thousand, six hundred twenty-one".