154400031 has 18 divisors (see below), whose sum is σ = 230989200. Its totient is φ = 99379056.

The previous prime is 154400027. The next prime is 154400033. The reversal of 154400031 is 130004451.

It is a happy number.

It is not a de Polignac number, because 154400031 - 2² = 154400027 is a prime.

It is a super-2 number, since 2×154400031² = 47678739145601922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 154399977 and 154400013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154400033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2631 + ... + 17768.

Almost surely, 2^154400031 is an apocalyptic number.

154400031 is a deficient number, since it is larger than the sum of its proper divisors (76589169).

154400031 is a wasteful number, since it uses less digits than its factorization.

154400031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20463 (or 20431 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 154400031 is about 12425.7809010138. The cubic root of 154400031 is about 536.4745544299.

Adding to 154400031 its reverse (130004451), we get a palindrome (284404482).

The spelling of 154400031 in words is "one hundred fifty-four million, four hundred thousand, thirty-one".