155155304144431 has 2 divisors, whose sum is σ = 155155304144432. Its totient is φ = 155155304144430.

The previous prime is 155155304144383. The next prime is 155155304144471. The reversal of 155155304144431 is 134441403551551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155155304144431 - 2¹⁵ = 155155304111663 is a prime.

It is a super-2 number, since 2×155155304144431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155155304144471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77577652072215 + 77577652072216.

It is an arithmetic number, because the mean of its divisors is an integer number (77577652072216).

Almost surely, 2^{155155304144431} is an apocalyptic number.

155155304144431 is a deficient number, since it is larger than the sum of its proper divisors (1).

155155304144431 is an equidigital number, since it uses as much as digits as its factorization.

155155304144431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440000, while the sum is 46.

Adding to 155155304144431 its reverse (134441403551551), we get a palindrome (289596707695982).

The spelling of 155155304144431 in words is "one hundred fifty-five trillion, one hundred fifty-five billion, three hundred four million, one hundred forty-four thousand, four hundred thirty-one".