156431642 has 16 divisors (see below), whose sum is σ = 242817792. Its totient is φ = 75504960.

The previous prime is 156431623. The next prime is 156431657. The reversal of 156431642 is 246134651.

156431642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 156431599 and 156431608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23933 + ... + 29759.

It is an arithmetic number, because the mean of its divisors is an integer number (15176112).

Almost surely, 2^156431642 is an apocalyptic number.

156431642 is a deficient number, since it is larger than the sum of its proper divisors (86386150).

156431642 is a wasteful number, since it uses less digits than its factorization.

156431642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293.

The product of its digits is 17280, while the sum is 32.

The square root of 156431642 is about 12507.2635696223. The cubic root of 156431642 is about 538.8173041240.

The spelling of 156431642 in words is "one hundred fifty-six million, four hundred thirty-one thousand, six hundred forty-two".