155011056103231 has 4 divisors (see below), whose sum is σ = 155145497610112. Its totient is φ = 154876614596352.

The previous prime is 155011056103217. The next prime is 155011056103289. The reversal of 155011056103231 is 132301650110551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155011056103231 - 2⁵ = 155011056103199 is a prime.

It is a super-2 number, since 2×155011056103231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155011056103831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67220751711 + ... + 67220754016.

It is an arithmetic number, because the mean of its divisors is an integer number (38786374402528).

Almost surely, 2^{155011056103231} is an apocalyptic number.

155011056103231 is a deficient number, since it is larger than the sum of its proper divisors (134441506881).

155011056103231 is a wasteful number, since it uses less digits than its factorization.

155011056103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134441506880.

The product of its (nonzero) digits is 13500, while the sum is 34.

The spelling of 155011056103231 in words is "one hundred fifty-five trillion, eleven billion, fifty-six million, one hundred three thousand, two hundred thirty-one".