172534138043 has 4 divisors (see below), whose sum is σ = 172536356688. Its totient is φ = 172531919400.

The previous prime is 172534138019. The next prime is 172534138087. The reversal of 172534138043 is 340831435271.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172534138043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172534138013) 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, 988271 + ... + 1149672.

It is an arithmetic number, because the mean of its divisors is an integer number (43134089172).

Almost surely, 2^172534138043 is an apocalyptic number.

172534138043 is a deficient number, since it is larger than the sum of its proper divisors (2218645).

172534138043 is an equidigital number, since it uses as much as digits as its factorization.

172534138043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218644.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 172534138043 in words is "one hundred seventy-two billion, five hundred thirty-four million, one hundred thirty-eight thousand, forty-three".