146143431 has 18 divisors (see below), whose sum is σ = 245561472. Its totient is φ = 83510280.

The previous prime is 146143427. The next prime is 146143433. The reversal of 146143431 is 134341641.

146143431 is a `hidden beast` number, since 1 + 4 + 614 + 3 + 43 + 1 = 666.

It is not a de Polignac number, because 146143431 - 2² = 146143427 is a prime.

It is a super-2 number, since 2×146143431² = 42715804848903522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 146143395 and 146143404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146143433) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 165255 + ... + 166136.

It is an arithmetic number, because the mean of its divisors is an integer number (13642304).

Almost surely, 2^146143431 is an apocalyptic number.

146143431 is a deficient number, since it is larger than the sum of its proper divisors (99418041).

146143431 is a wasteful number, since it uses less digits than its factorization.

146143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331411 (or 331401 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 146143431 is about 12088.9797336252. The cubic root of 146143431 is about 526.7361191767.

The spelling of 146143431 in words is "one hundred forty-six million, one hundred forty-three thousand, four hundred thirty-one".