151786381 has 2 divisors, whose sum is σ = 151786382. Its totient is φ = 151786380.

The previous prime is 151786357. The next prime is 151786391. The reversal of 151786381 is 183687151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122301481 + 29484900 = 11059^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 151786381 - 2¹¹ = 151784333 is a prime.

It is a super-2 number, since 2×151786381² = 46078210914154322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151786301) 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 as a sum of consecutive naturals, namely, 75893190 + 75893191.

It is an arithmetic number, because the mean of its divisors is an integer number (75893191).

Almost surely, 2^151786381 is an apocalyptic number.

It is an amenable number.

151786381 is a deficient number, since it is larger than the sum of its proper divisors (1).

151786381 is an equidigital number, since it uses as much as digits as its factorization.

151786381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 151786381 is about 12320.1615654990. The cubic root of 151786381 is about 533.4302031943.

The spelling of 151786381 in words is "one hundred fifty-one million, seven hundred eighty-six thousand, three hundred eighty-one".