64203431 has 2 divisors, whose sum is σ = 64203432. Its totient is φ = 64203430.

The previous prime is 64203409. The next prime is 64203437. The reversal of 64203431 is 13430246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64203431 is a prime.

It is a super-2 number, since 2×64203431² = 8244161104343522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64203397 and 64203406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64203437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32101715 + 32101716.

It is an arithmetic number, because the mean of its divisors is an integer number (32101716).

Almost surely, 2^64203431 is an apocalyptic number.

64203431 is a deficient number, since it is larger than the sum of its proper divisors (1).

64203431 is an equidigital number, since it uses as much as digits as its factorization.

64203431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 64203431 is about 8012.7043499682. The cubic root of 64203431 is about 400.4233663276.

Adding to 64203431 its reverse (13430246), we get a palindrome (77633677).

The spelling of 64203431 in words is "sixty-four million, two hundred three thousand, four hundred thirty-one".