2215915631 has 2 divisors, whose sum is σ = 2215915632. Its totient is φ = 2215915630.

The previous prime is 2215915601. The next prime is 2215915651. The reversal of 2215915631 is 1365195122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2215915631 - 2¹⁴ = 2215899247 is a prime.

It is a super-2 number, since 2×2215915631² = 9820564167420256322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2215915591 and 2215915600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215915601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107957815 + 1107957816.

It is an arithmetic number, because the mean of its divisors is an integer number (1107957816).

Almost surely, 2^2215915631 is an apocalyptic number.

2215915631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215915631 is an equidigital number, since it uses as much as digits as its factorization.

2215915631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 35.

The square root of 2215915631 is about 47073.5130513965. The cubic root of 2215915631 is about 1303.7202372519.

The spelling of 2215915631 in words is "two billion, two hundred fifteen million, nine hundred fifteen thousand, six hundred thirty-one".