45571820 has 24 divisors (see below), whose sum is σ = 109372704. Its totient is φ = 15624576.

The previous prime is 45571793. The next prime is 45571837. The reversal of 45571820 is 2817554.

It is a super-2 number, since 2×45571820² = 4153581556224800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162617 + ... + 162896.

It is an arithmetic number, because the mean of its divisors is an integer number (4557196).

Almost surely, 2^45571820 is an apocalyptic number.

It is an amenable number.

45571820 is an abundant number, since it is smaller than the sum of its proper divisors (63800884).

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

45571820 is a wasteful number, since it uses less digits than its factorization.

45571820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325529 (or 325527 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 45571820 is about 6750.6903350694. The cubic root of 45571820 is about 357.1895882470.

The spelling of 45571820 in words is "forty-five million, five hundred seventy-one thousand, eight hundred twenty".