45278523 has 12 divisors (see below), whose sum is σ = 65463840. Its totient is φ = 30157296.

The previous prime is 45278521. The next prime is 45278537. The reversal of 45278523 is 32587254.

It is not a de Polignac number, because 45278523 - 2¹ = 45278521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (45278521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12958 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (5455320).

Almost surely, 2^45278523 is an apocalyptic number.

45278523 is a deficient number, since it is larger than the sum of its proper divisors (20185317).

45278523 is a wasteful number, since it uses less digits than its factorization.

45278523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738 (or 4735 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 45278523 is about 6728.9317874385. The cubic root of 45278523 is about 356.4216561491.

The spelling of 45278523 in words is "forty-five million, two hundred seventy-eight thousand, five hundred twenty-three".