2231615257 has 2 divisors, whose sum is σ = 2231615258. Its totient is φ = 2231615256.

The previous prime is 2231615251. The next prime is 2231615263. The reversal of 2231615257 is 7525161322.

It is a balanced prime because it is at equal distance from previous prime (2231615251) and next prime (2231615263).

It can be written as a sum of positive squares in only one way, i.e., 2226329856 + 5285401 = 47184^2 + 2299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231615257 - 2³¹ = 84131609 is a prime.

It is a super-3 number, since 3×2231615257³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2231615251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115807628 + 1115807629.

It is an arithmetic number, because the mean of its divisors is an integer number (1115807629).

Almost surely, 2^2231615257 is an apocalyptic number.

It is an amenable number.

2231615257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231615257 is an equidigital number, since it uses as much as digits as its factorization.

2231615257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 2231615257 is about 47239.9752010943. The cubic root of 2231615257 is about 1306.7919203116.

Adding to 2231615257 its reverse (7525161322), we get a palindrome (9756776579).

It can be divided in two parts, 22316 and 15257, that added together give a palindrome (37573).

The spelling of 2231615257 in words is "two billion, two hundred thirty-one million, six hundred fifteen thousand, two hundred fifty-seven".