152381681 has 2 divisors, whose sum is σ = 152381682. Its totient is φ = 152381680.

The previous prime is 152381641. The next prime is 152381683. The reversal of 152381681 is 186183251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 47831056 = 10225^2 + 6916^2 .

It is a cyclic number.

It is not a de Polignac number, because 152381681 - 2¹⁸ = 152119537 is a prime.

It is a super-2 number, since 2×152381681² = 46440353408771522, which contains 22 as substring.

Together with 152381683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (152381683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76190840 + 76190841.

It is an arithmetic number, because the mean of its divisors is an integer number (76190841).

Almost surely, 2^152381681 is an apocalyptic number.

It is an amenable number.

152381681 is a deficient number, since it is larger than the sum of its proper divisors (1).

152381681 is an equidigital number, since it uses as much as digits as its factorization.

152381681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 35.

The square root of 152381681 is about 12344.2975093765. The cubic root of 152381681 is about 534.1266573367.

The spelling of 152381681 in words is "one hundred fifty-two million, three hundred eighty-one thousand, six hundred eighty-one".