154243131 has 24 divisors (see below), whose sum is σ = 239714640. Its totient is φ = 87962112.

The previous prime is 154243123. The next prime is 154243139. The reversal of 154243131 is 131342451.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (154243123) and next prime (154243139).

It is not a de Polignac number, because 154243131 - 2³ = 154243123 is a prime.

It is a super-2 number, since 2×154243131² = 47581886921366322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154243139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118275 + ... + 119571.

It is an arithmetic number, because the mean of its divisors is an integer number (9988110).

Almost surely, 2^154243131 is an apocalyptic number.

154243131 is a deficient number, since it is larger than the sum of its proper divisors (85471509).

154243131 is a wasteful number, since it uses less digits than its factorization.

154243131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2116 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 154243131 is about 12419.4658097681. The cubic root of 154243131 is about 536.2927725458.

Adding to 154243131 its reverse (131342451), we get a palindrome (285585582).

The spelling of 154243131 in words is "one hundred fifty-four million, two hundred forty-three thousand, one hundred thirty-one".