152197681 has 8 divisors (see below), whose sum is σ = 155453760. Its totient is φ = 148975632.

The previous prime is 152197667. The next prime is 152197711. The reversal of 152197681 is 186791251.

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 152197681 - 2⁵ = 152197649 is a prime.

It is a super-2 number, since 2×152197681² = 46328268203555522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152192681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636 + ... + 17458.

It is an arithmetic number, because the mean of its divisors is an integer number (19431720).

Almost surely, 2^152197681 is an apocalyptic number.

It is an amenable number.

152197681 is a deficient number, since it is larger than the sum of its proper divisors (3256079).

152197681 is a wasteful number, since it uses less digits than its factorization.

152197681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17015.

The product of its digits is 30240, while the sum is 40.

The square root of 152197681 is about 12336.8424242186. The cubic root of 152197681 is about 533.9115857960.

The spelling of 152197681 in words is "one hundred fifty-two million, one hundred ninety-seven thousand, six hundred eighty-one".