46218220 has 12 divisors (see below), whose sum is σ = 97058304. Its totient is φ = 18487280.

The previous prime is 46218209. The next prime is 46218229. The reversal of 46218220 is 2281264.

It is a happy number.

46218220 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×46218220² = 4272247719936800, which contains 22 as substring.

46218220 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (46218229) 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, 1155436 + ... + 1155475.

It is an arithmetic number, because the mean of its divisors is an integer number (8088192).

Almost surely, 2^46218220 is an apocalyptic number.

It is an amenable number.

46218220 is an abundant number, since it is smaller than the sum of its proper divisors (50840084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

46218220 is a wasteful number, since it uses less digits than its factorization.

46218220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310920 (or 2310918 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 46218220 is about 6798.3983407859. The cubic root of 46218220 is about 358.8704824236.

Adding to 46218220 its reverse (2281264), we get a palindrome (48499484).

The spelling of 46218220 in words is "forty-six million, two hundred eighteen thousand, two hundred twenty".