151316221 has 8 divisors (see below), whose sum is σ = 175017024. Its totient is φ = 128136480.

The previous prime is 151316213. The next prime is 151316227. The reversal of 151316221 is 122613151.

It is a happy number.

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 151316221 - 2³ = 151316213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 151316192 and 151316201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151316227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129640 + ... + 130801.

It is an arithmetic number, because the mean of its divisors is an integer number (21877128).

Almost surely, 2^151316221 is an apocalyptic number.

It is an amenable number.

151316221 is a deficient number, since it is larger than the sum of its proper divisors (23700803).

151316221 is an equidigital number, since it uses as much as digits as its factorization.

151316221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260531.

The product of its digits is 360, while the sum is 22.

The square root of 151316221 is about 12301.0658481288. The cubic root of 151316221 is about 532.8788648845.

Adding to 151316221 its reverse (122613151), we get a palindrome (273929372).

The spelling of 151316221 in words is "one hundred fifty-one million, three hundred sixteen thousand, two hundred twenty-one".