155432224091 has 2 divisors, whose sum is σ = 155432224092. Its totient is φ = 155432224090.

The previous prime is 155432224019. The next prime is 155432224097. The reversal of 155432224091 is 190422234551.

Together with previous prime (155432224019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155432224091 - 2²² = 155428029787 is a prime.

It is not a weakly prime, because it can be changed into another prime (155432224097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77716112045 + 77716112046.

It is an arithmetic number, because the mean of its divisors is an integer number (77716112046).

Almost surely, 2^155432224091 is an apocalyptic number.

155432224091 is a deficient number, since it is larger than the sum of its proper divisors (1).

155432224091 is an equidigital number, since it uses as much as digits as its factorization.

155432224091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 155432224091 in words is "one hundred fifty-five billion, four hundred thirty-two million, two hundred twenty-four thousand, ninety-one".