45571220 has 24 divisors (see below), whose sum is σ = 101329704. Its totient is φ = 17156096.

The previous prime is 45571219. The next prime is 45571223. The reversal of 45571220 is 2217554.

It can be written as a sum of positive squares in 4 ways, for example, as 10666756 + 34904464 = 3266^2 + 5908^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 45571220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45571223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66677 + ... + 67356.

It is an arithmetic number, because the mean of its divisors is an integer number (4222071).

Almost surely, 2^45571220 is an apocalyptic number.

It is an amenable number.

45571220 is an abundant number, since it is smaller than the sum of its proper divisors (55758484).

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

45571220 is a wasteful number, since it uses less digits than its factorization.

45571220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134059 (or 134057 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 45571220 is about 6750.6458950237. The cubic root of 45571220 is about 357.1880206504.

Adding to 45571220 its reverse (2217554), we get a palindrome (47788774).

It can be divided in two parts, 45 and 571220, that multiplied together give a square (25704900 = 5070²).

The spelling of 45571220 in words is "forty-five million, five hundred seventy-one thousand, two hundred twenty".