203116431 has 16 divisors (see below), whose sum is σ = 309741824. Its totient is φ = 115979904.

The previous prime is 203116411. The next prime is 203116451. The reversal of 203116431 is 134611302.

It is an interprime number because it is at equal distance from previous prime (203116411) and next prime (203116451).

It is not a de Polignac number, because 203116431 - 2¹¹ = 203114383 is a prime.

It is a super-2 number, since 2×203116431² = 82512569084355522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 203116398 and 203116407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203116411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34596 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (19358864).

Almost surely, 2^203116431 is an apocalyptic number.

203116431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

203116431 is a deficient number, since it is larger than the sum of its proper divisors (106625393).

203116431 is a wasteful number, since it uses less digits than its factorization.

203116431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 203116431 is about 14251.8921901620. The cubic root of 203116431 is about 587.8254057270.

Adding to 203116431 its reverse (134611302), we get a palindrome (337727733).

The spelling of 203116431 in words is "two hundred three million, one hundred sixteen thousand, four hundred thirty-one".