31143903 has 8 divisors (see below), whose sum is σ = 47457408. Its totient is φ = 17796504.

The previous prime is 31143877. The next prime is 31143919. The reversal of 31143903 is 30934113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31143903 - 2⁶ = 31143839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741501 + ... + 741542.

It is an arithmetic number, because the mean of its divisors is an integer number (5932176).

Almost surely, 2^31143903 is an apocalyptic number.

31143903 is a deficient number, since it is larger than the sum of its proper divisors (16313505).

31143903 is a wasteful number, since it uses less digits than its factorization.

31143903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483053.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 31143903 is about 5580.6722713308. The cubic root of 31143903 is about 314.6233947178.

The spelling of 31143903 in words is "thirty-one million, one hundred forty-three thousand, nine hundred three".