203157431 has 4 divisors (see below), whose sum is σ = 203199864. Its totient is φ = 203115000.

The previous prime is 203157421. The next prime is 203157433. The reversal of 203157431 is 134751302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203157431 - 2¹⁰ = 203156407 is a prime.

It is a super-2 number, since 2×203157431² = 82545883541039522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203157431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203157433) 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 3 ways as a sum of consecutive naturals, for example, 12965 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (50799966).

Almost surely, 2^203157431 is an apocalyptic number.

203157431 is a deficient number, since it is larger than the sum of its proper divisors (42433).

203157431 is an equidigital number, since it uses as much as digits as its factorization.

203157431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42432.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 203157431 is about 14253.3305230742. The cubic root of 203157431 is about 587.8649548337.

The spelling of 203157431 in words is "two hundred three million, one hundred fifty-seven thousand, four hundred thirty-one".