2215251331 has 2 divisors, whose sum is σ = 2215251332. Its totient is φ = 2215251330.

The previous prime is 2215251319. The next prime is 2215251341. The reversal of 2215251331 is 1331525122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2215251331 - 2⁵ = 2215251299 is a prime.

It is a super-2 number, since 2×2215251331² = 9814676918994543122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2215251296 and 2215251305.

It is not a weakly prime, because it can be changed into another prime (2215251341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107625665 + 1107625666.

It is an arithmetic number, because the mean of its divisors is an integer number (1107625666).

Almost surely, 2^2215251331 is an apocalyptic number.

2215251331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215251331 is an equidigital number, since it uses as much as digits as its factorization.

2215251331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 2215251331 is about 47066.4565375385. The cubic root of 2215251331 is about 1303.5899453009.

Adding to 2215251331 its reverse (1331525122), we get a palindrome (3546776453).

The spelling of 2215251331 in words is "two billion, two hundred fifteen million, two hundred fifty-one thousand, three hundred thirty-one".