47345220 has 72 divisors (see below), whose sum is σ = 154668696. Its totient is φ = 11653632.

The previous prime is 47345209. The next prime is 47345231. The reversal of 47345220 is 2254374.

It is an interprime number because it is at equal distance from previous prime (47345209) and next prime (47345231).

It can be written as a sum of positive squares in 4 ways, for example, as 887364 + 46457856 = 942^2 + 6816^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7777 + ... + 12456.

Almost surely, 2^47345220 is an apocalyptic number.

It is an amenable number.

47345220 is an abundant number, since it is smaller than the sum of its proper divisors (107323476).

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

47345220 is a wasteful number, since it uses less digits than its factorization.

47345220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20261 (or 20256 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 47345220 is about 6880.7862922779. The cubic root of 47345220 is about 361.7640272001.

Adding to 47345220 its reverse (2254374), we get a palindrome (49599594).

The spelling of 47345220 in words is "forty-seven million, three hundred forty-five thousand, two hundred twenty".