45732821 has 4 divisors (see below), whose sum is σ = 46359372. Its totient is φ = 45106272.

The previous prime is 45732811. The next prime is 45732823. The reversal of 45732821 is 12823754.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19096900 + 26635921 = 4370^2 + 5161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45732821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45732823) 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, 313166 + ... + 313311.

It is an arithmetic number, because the mean of its divisors is an integer number (11589843).

Almost surely, 2^45732821 is an apocalyptic number.

It is an amenable number.

45732821 is a deficient number, since it is larger than the sum of its proper divisors (626551).

45732821 is an equidigital number, since it uses as much as digits as its factorization.

45732821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626550.

The product of its digits is 13440, while the sum is 32.

The square root of 45732821 is about 6762.6046017788. The cubic root of 45732821 is about 357.6097330512.

The spelling of 45732821 in words is "forty-five million, seven hundred thirty-two thousand, eight hundred twenty-one".