151140209 has 4 divisors (see below), whose sum is σ = 164880240. Its totient is φ = 137400180.

The previous prime is 151140179. The next prime is 151140247. The reversal of 151140209 is 902041151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902041151 = 11 ⋅82003741.

It is a cyclic number.

It is not a de Polignac number, because 151140209 - 2⁸ = 151139953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151140299) 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, 6869999 + ... + 6870020.

It is an arithmetic number, because the mean of its divisors is an integer number (41220060).

Almost surely, 2^151140209 is an apocalyptic number.

It is an amenable number.

151140209 is a deficient number, since it is larger than the sum of its proper divisors (13740031).

151140209 is a wasteful number, since it uses less digits than its factorization.

151140209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13740030.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 151140209 is about 12293.9094270293. The cubic root of 151140209 is about 532.6721686811.

The spelling of 151140209 in words is "one hundred fifty-one million, one hundred forty thousand, two hundred nine".