2215620131 has 4 divisors (see below), whose sum is σ = 2230293264. Its totient is φ = 2200947000.

The previous prime is 2215620073. The next prime is 2215620137. The reversal of 2215620131 is 1310265122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2215620131 - 2³⁰ = 1141878307 is a prime.

It is a super-2 number, since 2×2215620131² = 9817945129784914322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2215620097 and 2215620106.

It is not an unprimeable number, because it can be changed into a prime (2215620137) 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, 7336340 + ... + 7336641.

It is an arithmetic number, because the mean of its divisors is an integer number (557573316).

Almost surely, 2^2215620131 is an apocalyptic number.

2215620131 is a deficient number, since it is larger than the sum of its proper divisors (14673133).

2215620131 is a wasteful number, since it uses less digits than its factorization.

2215620131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14673132.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2215620131 is about 47070.3742390052. The cubic root of 2215620131 is about 1303.6622828107.

Adding to 2215620131 its reverse (1310265122), we get a palindrome (3525885253).

The spelling of 2215620131 in words is "two billion, two hundred fifteen million, six hundred twenty thousand, one hundred thirty-one".