208460431 has 16 divisors (see below), whose sum is σ = 224421120. Its totient is φ = 193152960.

The previous prime is 208460423. The next prime is 208460437. The reversal of 208460431 is 134064802.

It is a cyclic number.

It is not a de Polignac number, because 208460431 - 2³ = 208460423 is a prime.

It is a super-2 number, since 2×208460431² = 86911502585411522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208460431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208460437) 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, 128755 + ... + 130363.

It is an arithmetic number, because the mean of its divisors is an integer number (14026320).

Almost surely, 2^208460431 is an apocalyptic number.

208460431 is a deficient number, since it is larger than the sum of its proper divisors (15960689).

208460431 is a wasteful number, since it uses less digits than its factorization.

208460431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 208460431 is about 14438.1588507676. The cubic root of 208460431 is about 592.9360789987.

The spelling of 208460431 in words is "two hundred eight million, four hundred sixty thousand, four hundred thirty-one".