143942031 has 12 divisors (see below), whose sum is σ = 208082160. Its totient is φ = 95884800.

The previous prime is 143942023. The next prime is 143942053. The reversal of 143942031 is 130249341.

It is not a de Polignac number, because 143942031 - 2³ = 143942023 is a prime.

It is a super-2 number, since 2×143942031² = 41438616576809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 143941986 and 143942004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143942131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7006 + ... + 18356.

It is an arithmetic number, because the mean of its divisors is an integer number (17340180).

Almost surely, 2^143942031 is an apocalyptic number.

143942031 is a deficient number, since it is larger than the sum of its proper divisors (64140129).

143942031 is a wasteful number, since it uses less digits than its factorization.

143942031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12766 (or 12763 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 143942031 is about 11997.5843818662. The cubic root of 143942031 is about 524.0779352545.

The spelling of 143942031 in words is "one hundred forty-three million, nine hundred forty-two thousand, thirty-one".