200123431 has 2 divisors, whose sum is σ = 200123432. Its totient is φ = 200123430.

The previous prime is 200123401. The next prime is 200123449. The reversal of 200123431 is 134321002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200123431 - 2⁹ = 200122919 is a prime.

It is a super-2 number, since 2×200123431² = 80098775270423522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200123401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061715 + 100061716.

It is an arithmetic number, because the mean of its divisors is an integer number (100061716).

Almost surely, 2^200123431 is an apocalyptic number.

200123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

200123431 is an equidigital number, since it uses as much as digits as its factorization.

200123431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 200123431 is about 14146.4988954865. The cubic root of 200123431 is about 584.9238277133.

Adding to 200123431 its reverse (134321002), we get a palindrome (334444433).

The spelling of 200123431 in words is "two hundred million, one hundred twenty-three thousand, four hundred thirty-one".