203199817031 has 2 divisors, whose sum is σ = 203199817032. Its totient is φ = 203199817030.

The previous prime is 203199816949. The next prime is 203199817043. The reversal of 203199817031 is 130718991302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203199817031 is a prime.

It is a super-2 number, since 2×203199817031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203199817081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101599908515 + 101599908516.

It is an arithmetic number, because the mean of its divisors is an integer number (101599908516).

Almost surely, 2^203199817031 is an apocalyptic number.

203199817031 is a deficient number, since it is larger than the sum of its proper divisors (1).

203199817031 is an equidigital number, since it uses as much as digits as its factorization.

203199817031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 203199817031 in words is "two hundred three billion, one hundred ninety-nine million, eight hundred seventeen thousand, thirty-one".