218290425 has 12 divisors (see below), whose sum is σ = 360906960. Its totient is φ = 116421520.

The previous prime is 218290399. The next prime is 218290427. The reversal of 218290425 is 524092812.

218290425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218290425 - 2⁶ = 218290361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218290427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1455195 + ... + 1455344.

It is an arithmetic number, because the mean of its divisors is an integer number (30075580).

Almost surely, 2^218290425 is an apocalyptic number.

218290425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

218290425 is a deficient number, since it is larger than the sum of its proper divisors (142616535).

218290425 is a wasteful number, since it uses less digits than its factorization.

218290425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910552 (or 2910547 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 218290425 is about 14774.6548183029. The cubic root of 218290425 is about 602.1133116727.

The spelling of 218290425 in words is "two hundred eighteen million, two hundred ninety thousand, four hundred twenty-five".