151072217 has 4 divisors (see below), whose sum is σ = 159958836. Its totient is φ = 142185600.

The previous prime is 151072189. The next prime is 151072237. The reversal of 151072217 is 712270151.

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

It can be written as a sum of positive squares in 2 ways, for example, as 121793296 + 29278921 = 11036^2 + 5411^2 .

It is a cyclic number.

It is not a de Polignac number, because 151072217 - 2⁶ = 151072153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151072237) 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, 4443284 + ... + 4443317.

It is an arithmetic number, because the mean of its divisors is an integer number (39989709).

Almost surely, 2^151072217 is an apocalyptic number.

151072217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

151072217 is a deficient number, since it is larger than the sum of its proper divisors (8886619).

151072217 is an equidigital number, since it uses as much as digits as its factorization.

151072217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886618.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 151072217 is about 12291.1438442482. The cubic root of 151072217 is about 532.5922806561.

The spelling of 151072217 in words is "one hundred fifty-one million, seventy-two thousand, two hundred seventeen".