130215761 has 8 divisors (see below), whose sum is σ = 140742504. Its totient is φ = 119761920.

The previous prime is 130215751. The next prime is 130215763. The reversal of 130215761 is 167512031.

It can be written as a sum of positive squares in 4 ways, for example, as 4080400 + 126135361 = 2020^2 + 11231^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130215761 - 2⁶ = 130215697 is a prime.

It is a super-2 number, since 2×130215761² = 33912288825618242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130215761.

It is not an unprimeable number, because it can be changed into a prime (130215763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14480 + ... + 21681.

It is an arithmetic number, because the mean of its divisors is an integer number (17592813).

Almost surely, 2^130215761 is an apocalyptic number.

It is an amenable number.

130215761 is a deficient number, since it is larger than the sum of its proper divisors (10526743).

130215761 is a wasteful number, since it uses less digits than its factorization.

130215761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36451.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 130215761 is about 11411.2120740962. The cubic root of 130215761 is about 506.8598037826.

Adding to 130215761 its reverse (167512031), we get a palindrome (297727792).

The spelling of 130215761 in words is "one hundred thirty million, two hundred fifteen thousand, seven hundred sixty-one".