45152021 has 8 divisors (see below), whose sum is σ = 46305600. Its totient is φ = 44003232.

The previous prime is 45151979. The next prime is 45152053. The reversal of 45152021 is 12025154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45152021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45151984 and 45152002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45152071) 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, 24881 + ... + 26633.

It is an arithmetic number, because the mean of its divisors is an integer number (5788200).

Almost surely, 2^45152021 is an apocalyptic number.

It is an amenable number.

45152021 is a deficient number, since it is larger than the sum of its proper divisors (1153579).

45152021 is a wasteful number, since it uses less digits than its factorization.

45152021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 45152021 is about 6719.5253552613. The cubic root of 45152021 is about 356.0894154266.

Adding to 45152021 its reverse (12025154), we get a palindrome (57177175).

The spelling of 45152021 in words is "forty-five million, one hundred fifty-two thousand, twenty-one".