172742143211 has 4 divisors (see below), whose sum is σ = 188445974424. Its totient is φ = 157038312000.

The previous prime is 172742143199. The next prime is 172742143219. The reversal of 172742143211 is 112341247271.

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-172742143211 is a prime.

It is a super-2 number, since 2×172742143211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172742143219) 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, 7851915590 + ... + 7851915611.

It is an arithmetic number, because the mean of its divisors is an integer number (47111493606).

Almost surely, 2^172742143211 is an apocalyptic number.

172742143211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172742143211 is a deficient number, since it is larger than the sum of its proper divisors (15703831213).

172742143211 is a wasteful number, since it uses less digits than its factorization.

172742143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15703831212.

The product of its digits is 18816, while the sum is 35.

The spelling of 172742143211 in words is "one hundred seventy-two billion, seven hundred forty-two million, one hundred forty-three thousand, two hundred eleven".