45215661 has 32 divisors (see below), whose sum is σ = 64576512. Its totient is φ = 28103040.

The previous prime is 45215659. The next prime is 45215671. The reversal of 45215661 is 16651254.

It is not a de Polignac number, because 45215661 - 2¹ = 45215659 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45215641) 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 31 ways as a sum of consecutive naturals, for example, 438936 + ... + 439038.

It is an arithmetic number, because the mean of its divisors is an integer number (2018016).

Almost surely, 2^45215661 is an apocalyptic number.

45215661 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

45215661 is a deficient number, since it is larger than the sum of its proper divisors (19360851).

45215661 is a wasteful number, since it uses less digits than its factorization.

45215661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its digits is 7200, while the sum is 30.

The square root of 45215661 is about 6724.2591413478. The cubic root of 45215661 is about 356.2566349026.

The spelling of 45215661 in words is "forty-five million, two hundred fifteen thousand, six hundred sixty-one".