240154381 has 2 divisors, whose sum is σ = 240154382. Its totient is φ = 240154380.

The previous prime is 240154379. The next prime is 240154399. The reversal of 240154381 is 183451042.

240154381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238208356 + 1946025 = 15434^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 240154381 - 2¹ = 240154379 is a prime.

It is a super-2 number, since 2×240154381² = 115348253426986322, which contains 22 as substring.

Together with 240154379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240154181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120077190 + 120077191.

It is an arithmetic number, because the mean of its divisors is an integer number (120077191).

Almost surely, 2^240154381 is an apocalyptic number.

It is an amenable number.

240154381 is a deficient number, since it is larger than the sum of its proper divisors (1).

240154381 is an equidigital number, since it uses as much as digits as its factorization.

240154381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 240154381 is about 15496.9152091634. The cubic root of 240154381 is about 621.5797219803.

The spelling of 240154381 in words is "two hundred forty million, one hundred fifty-four thousand, three hundred eighty-one".