155144232523 has 12 divisors (see below), whose sum is σ = 180950109240. Its totient is φ = 132629882112.

The previous prime is 155144232521. The next prime is 155144232527. The reversal of 155144232523 is 325232441551.

It is a happy number.

It is not a de Polignac number, because 155144232523 - 2¹ = 155144232521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155144232521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4158486 + ... + 4195627.

It is an arithmetic number, because the mean of its divisors is an integer number (15079175770).

Almost surely, 2^155144232523 is an apocalyptic number.

155144232523 is a deficient number, since it is larger than the sum of its proper divisors (25805876717).

155144232523 is an equidigital number, since it uses as much as digits as its factorization.

155144232523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354506 (or 8354499 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The spelling of 155144232523 in words is "one hundred fifty-five billion, one hundred forty-four million, two hundred thirty-two thousand, five hundred twenty-three".