151712221205 has 8 divisors (see below), whose sum is σ = 182997955032. Its totient is φ = 120740917248.

The previous prime is 151712221147. The next prime is 151712221291. The reversal of 151712221205 is 502122217151.

It can be written as a sum of positive squares in 4 ways, for example, as 5831765956 + 145880455249 = 76366^2 + 381943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151712221205 - 2²⁶ = 151645112341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78606404 + ... + 78608333.

It is an arithmetic number, because the mean of its divisors is an integer number (22874744379).

Almost surely, 2^151712221205 is an apocalyptic number.

It is an amenable number.

151712221205 is a deficient number, since it is larger than the sum of its proper divisors (31285733827).

151712221205 is a wasteful number, since it uses less digits than its factorization.

151712221205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157214935.

The product of its (nonzero) digits is 2800, while the sum is 29.

Adding to 151712221205 its reverse (502122217151), we get a palindrome (653834438356).

The spelling of 151712221205 in words is "one hundred fifty-one billion, seven hundred twelve million, two hundred twenty-one thousand, two hundred five".