164256403 has 4 divisors (see below), whose sum is σ = 164774880. Its totient is φ = 163737928.

The previous prime is 164256361. The next prime is 164256427. The reversal of 164256403 is 304652461.

164256403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 164256403 - 2⁹ = 164255891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164256473) 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, 258763 + ... + 259396.

It is an arithmetic number, because the mean of its divisors is an integer number (41193720).

Almost surely, 2^164256403 is an apocalyptic number.

164256403 is a deficient number, since it is larger than the sum of its proper divisors (518477).

164256403 is an equidigital number, since it uses as much as digits as its factorization.

164256403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518476.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 164256403 is about 12816.2554203636. The cubic root of 164256403 is about 547.6554778996.

The spelling of 164256403 in words is "one hundred sixty-four million, two hundred fifty-six thousand, four hundred three".