2231615251 has 2 divisors, whose sum is σ = 2231615252. Its totient is φ = 2231615250.

The previous prime is 2231615231. The next prime is 2231615257. The reversal of 2231615251 is 1525161322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231615251 is a prime.

It is a super-3 number, since 3×2231615251³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2231615257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115807625 + 1115807626.

It is an arithmetic number, because the mean of its divisors is an integer number (1115807626).

Almost surely, 2^2231615251 is an apocalyptic number.

2231615251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231615251 is an equidigital number, since it uses as much as digits as its factorization.

2231615251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 2231615251 is about 47239.9751375887. The cubic root of 2231615251 is about 1306.7919191404.

Adding to 2231615251 its reverse (1525161322), we get a palindrome (3756776573).

The spelling of 2231615251 in words is "two billion, two hundred thirty-one million, six hundred fifteen thousand, two hundred fifty-one".