155144441531 has 2 divisors, whose sum is σ = 155144441532. Its totient is φ = 155144441530.

The previous prime is 155144441453. The next prime is 155144441603. The reversal of 155144441531 is 135144441551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155144441531 - 2³⁰ = 154070699707 is a prime.

It is a super-2 number, since 2×155144441531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155144431531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77572220765 + 77572220766.

It is an arithmetic number, because the mean of its divisors is an integer number (77572220766).

Almost surely, 2^155144441531 is an apocalyptic number.

155144441531 is a deficient number, since it is larger than the sum of its proper divisors (1).

155144441531 is an equidigital number, since it uses as much as digits as its factorization.

155144441531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96000, while the sum is 38.

The spelling of 155144441531 in words is "one hundred fifty-five billion, one hundred forty-four million, four hundred forty-one thousand, five hundred thirty-one".