45821971 has 4 divisors (see below), whose sum is σ = 49346752. Its totient is φ = 42297192.

The previous prime is 45821933. The next prime is 45821989. The reversal of 45821971 is 17912854.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45821971 - 2¹⁵ = 45789203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45821971.

It is not an unprimeable number, because it can be changed into a prime (45821071) 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, 1762371 + ... + 1762396.

It is an arithmetic number, because the mean of its divisors is an integer number (12336688).

Almost surely, 2^45821971 is an apocalyptic number.

45821971 is a deficient number, since it is larger than the sum of its proper divisors (3524781).

45821971 is a wasteful number, since it uses less digits than its factorization.

45821971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524780.

The product of its digits is 20160, while the sum is 37.

The square root of 45821971 is about 6769.1927879179. The cubic root of 45821971 is about 357.8419529578.

The spelling of 45821971 in words is "forty-five million, eight hundred twenty-one thousand, nine hundred seventy-one".