153431985 has 48 divisors (see below), whose sum is σ = 287280000. Its totient is φ = 69721344.

The previous prime is 153431959. The next prime is 153432001. The reversal of 153431985 is 589134351.

153431985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 153431985 - 2⁶ = 153431921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145741 + ... + 146789.

It is an arithmetic number, because the mean of its divisors is an integer number (5985000).

Almost surely, 2^153431985 is an apocalyptic number.

153431985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

153431985 is a deficient number, since it is larger than the sum of its proper divisors (133848015).

153431985 is a wasteful number, since it uses less digits than its factorization.

153431985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1263 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 153431985 is about 12386.7665272257. The cubic root of 153431985 is about 535.3510201141.

The spelling of 153431985 in words is "one hundred fifty-three million, four hundred thirty-one thousand, nine hundred eighty-five".