208456401 has 4 divisors (see below), whose sum is σ = 277941872. Its totient is φ = 138970932.

The previous prime is 208456399. The next prime is 208456427. The reversal of 208456401 is 104654802.

208456401 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 208456401 - 2¹ = 208456399 is a prime.

It is a super-2 number, since 2×208456401² = 86908142235745602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208456441) 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, 34742731 + ... + 34742736.

It is an arithmetic number, because the mean of its divisors is an integer number (69485468).

Almost surely, 2^208456401 is an apocalyptic number.

It is an amenable number.

208456401 is a deficient number, since it is larger than the sum of its proper divisors (69485471).

208456401 is an equidigital number, since it uses as much as digits as its factorization.

208456401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69485470.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 208456401 is about 14438.0192893624. The cubic root of 208456401 is about 592.9322580533.

It can be divided in two parts, 2084 and 56401, that added together give a palindrome (58485).

The spelling of 208456401 in words is "two hundred eight million, four hundred fifty-six thousand, four hundred one".