155202140212551 has 6 divisors (see below), whose sum is σ = 224180869195920. Its totient is φ = 103468093475028.

The previous prime is 155202140212531. The next prime is 155202140212579. The reversal of 155202140212551 is 155212041202551.

155202140212551 is a `hidden beast` number, since 1 + 5 + 5 + 20 + 21 + 40 + 21 + 2 + 551 = 666.

It is not a de Polignac number, because 155202140212551 - 2⁵ = 155202140212519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155202140212531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8622341122911 + ... + 8622341122928.

It is an arithmetic number, because the mean of its divisors is an integer number (37363478199320).

Almost surely, 2^{155202140212551} is an apocalyptic number.

155202140212551 is a deficient number, since it is larger than the sum of its proper divisors (68978728983369).

155202140212551 is a wasteful number, since it uses less digits than its factorization.

155202140212551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17244682245845 (or 17244682245842 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 155202140212551 in words is "one hundred fifty-five trillion, two hundred two billion, one hundred forty million, two hundred twelve thousand, five hundred fifty-one".