15231122287 has 2 divisors, whose sum is σ = 15231122288. Its totient is φ = 15231122286.

The previous prime is 15231122281. The next prime is 15231122311. The reversal of 15231122287 is 78222113251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15231122287 - 2¹⁵ = 15231089519 is a prime.

It is a super-2 number, since 2×15231122287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15231122281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7615561143 + 7615561144.

It is an arithmetic number, because the mean of its divisors is an integer number (7615561144).

Almost surely, 2^15231122287 is an apocalyptic number.

15231122287 is a deficient number, since it is larger than the sum of its proper divisors (1).

15231122287 is an equidigital number, since it uses as much as digits as its factorization.

15231122287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The spelling of 15231122287 in words is "fifteen billion, two hundred thirty-one million, one hundred twenty-two thousand, two hundred eighty-seven".