154140931 has 4 divisors (see below), whose sum is σ = 176161072. Its totient is φ = 132120792.

The previous prime is 154140913. The next prime is 154140953. The reversal of 154140931 is 139041451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139041451 = 103 ⋅1349917.

It is a cyclic number.

It is not a de Polignac number, because 154140931 - 2⁹ = 154140419 is a prime.

It is a super-2 number, since 2×154140931² = 47518853219093522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154140931.

It is not an unprimeable number, because it can be changed into a prime (154140971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11010060 + ... + 11010073.

It is an arithmetic number, because the mean of its divisors is an integer number (44040268).

Almost surely, 2^154140931 is an apocalyptic number.

154140931 is a deficient number, since it is larger than the sum of its proper divisors (22020141).

154140931 is an equidigital number, since it uses as much as digits as its factorization.

154140931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22020140.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 154140931 is about 12415.3506192938. The cubic root of 154140931 is about 536.1742989153.

The spelling of 154140931 in words is "one hundred fifty-four million, one hundred forty thousand, nine hundred thirty-one".