155503231525 has 24 divisors (see below), whose sum is σ = 200236184064. Its totient is φ = 119668603200.

The previous prime is 155503231519. The next prime is 155503231529. The reversal of 155503231525 is 525132305551.

It is not a de Polignac number, because 155503231525 - 2¹⁵ = 155503198757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155503231529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471322 + ... + 730171.

It is an arithmetic number, because the mean of its divisors is an integer number (8343174336).

Almost surely, 2^155503231525 is an apocalyptic number.

It is an amenable number.

155503231525 is a deficient number, since it is larger than the sum of its proper divisors (44732952539).

155503231525 is a wasteful number, since it uses less digits than its factorization.

155503231525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201701 (or 1201696 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 155503231525 in words is "one hundred fifty-five billion, five hundred three million, two hundred thirty-one thousand, five hundred twenty-five".