16155655231 has 2 divisors, whose sum is σ = 16155655232. Its totient is φ = 16155655230.

The previous prime is 16155655223. The next prime is 16155655249. The reversal of 16155655231 is 13255655161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16155655231 - 2³ = 16155655223 is a prime.

It is a super-2 number, since 2×16155655231² (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 (16155655031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8077827615 + 8077827616.

It is an arithmetic number, because the mean of its divisors is an integer number (8077827616).

Almost surely, 2^16155655231 is an apocalyptic number.

16155655231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16155655231 is an equidigital number, since it uses as much as digits as its factorization.

16155655231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 40.

The spelling of 16155655231 in words is "sixteen billion, one hundred fifty-five million, six hundred fifty-five thousand, two hundred thirty-one".