45512551 has 4 divisors (see below), whose sum is σ = 52014352. Its totient is φ = 39010752.

The previous prime is 45512549. The next prime is 45512563. The reversal of 45512551 is 15521554.

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 45512551 - 2¹ = 45512549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45512521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3250890 + ... + 3250903.

It is an arithmetic number, because the mean of its divisors is an integer number (13003588).

Almost surely, 2^45512551 is an apocalyptic number.

45512551 is a deficient number, since it is larger than the sum of its proper divisors (6501801).

45512551 is an equidigital number, since it uses as much as digits as its factorization.

45512551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6501800.

The product of its digits is 5000, while the sum is 28.

The square root of 45512551 is about 6746.2990594844. The cubic root of 45512551 is about 357.0346719406.

The spelling of 45512551 in words is "forty-five million, five hundred twelve thousand, five hundred fifty-one".