151273545721 has 9 divisors (see below), whose sum is σ = 152488480783. Its totient is φ = 150068223760.

The previous prime is 151273545673. The next prime is 151273545737. The reversal of 151273545721 is 127545372151.

The square root of 151273545721 is 388939.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 915728121 + 150357817600 = 30261^2 + 387760^2 .

It is not a de Polignac number, because 151273545721 - 2³¹ = 149126062073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151273545221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 50949525 + ... + 50952493.

Almost surely, 2^151273545721 is an apocalyptic number.

151273545721 is the 388939-th square number.

151273545721 is the 194470-th centered octagonal number.

It is an amenable number.

151273545721 is a deficient number, since it is larger than the sum of its proper divisors (1214935062).

151273545721 is an frugal number, since it uses more digits than its factorization.

151273545721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200 (or 3100 counting only the distinct ones).

The product of its digits is 294000, while the sum is 43.

The spelling of 151273545721 in words is "one hundred fifty-one billion, two hundred seventy-three million, five hundred forty-five thousand, seven hundred twenty-one".