15215344231 has 2 divisors, whose sum is σ = 15215344232. Its totient is φ = 15215344230.

The previous prime is 15215344201. The next prime is 15215344241. The reversal of 15215344231 is 13244351251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15215344231 - 2¹¹ = 15215342183 is a prime.

It is a super-2 number, since 2×15215344231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15215344193 and 15215344202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15215344201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607672115 + 7607672116.

It is an arithmetic number, because the mean of its divisors is an integer number (7607672116).

Almost surely, 2^15215344231 is an apocalyptic number.

15215344231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15215344231 is an equidigital number, since it uses as much as digits as its factorization.

15215344231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

Adding to 15215344231 its reverse (13244351251), we get a palindrome (28459695482).

The spelling of 15215344231 in words is "fifteen billion, two hundred fifteen million, three hundred forty-four thousand, two hundred thirty-one".