45440851 has 4 divisors (see below), whose sum is σ = 45507304. Its totient is φ = 45374400.

The previous prime is 45440849. The next prime is 45440861. The reversal of 45440851 is 15804454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15804454 = 2 ⋅7902227.

It is a cyclic number.

It is not a de Polignac number, because 45440851 - 2¹ = 45440849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45440861) 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, 32190 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (11376826).

Almost surely, 2^45440851 is an apocalyptic number.

45440851 is a deficient number, since it is larger than the sum of its proper divisors (66453).

45440851 is an equidigital number, since it uses as much as digits as its factorization.

45440851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66452.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 45440851 is about 6740.9829401950. The cubic root of 45440851 is about 356.8470838270.

It can be divided in two parts, 45 and 440851, that added together give a square (440896 = 664²).

The spelling of 45440851 in words is "forty-five million, four hundred forty thousand, eight hundred fifty-one".