210066431 has 4 divisors (see below), whose sum is σ = 210105792. Its totient is φ = 210027072.

The previous prime is 210066379. The next prime is 210066449. The reversal of 210066431 is 134660012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210066431 - 2²² = 205872127 is a prime.

It is a super-2 number, since 2×210066431² = 88255810866155522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210066397 and 210066406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210866431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10130 + ... + 22863.

It is an arithmetic number, because the mean of its divisors is an integer number (52526448).

Almost surely, 2^210066431 is an apocalyptic number.

210066431 is a deficient number, since it is larger than the sum of its proper divisors (39361).

210066431 is an equidigital number, since it uses as much as digits as its factorization.

210066431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39360.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 210066431 is about 14493.6686522081. The cubic root of 210066431 is about 594.4548649668.

The spelling of 210066431 in words is "two hundred ten million, sixty-six thousand, four hundred thirty-one".