45212523 has 4 divisors (see below), whose sum is σ = 60283368. Its totient is φ = 30141680.

The previous prime is 45212521. The next prime is 45212527. The reversal of 45212523 is 32521254.

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 45212523 - 2¹ = 45212521 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 45212493 and 45212502.

It is not an unprimeable number, because it can be changed into a prime (45212521) 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, 7535418 + ... + 7535423.

It is an arithmetic number, because the mean of its divisors is an integer number (15070842).

Almost surely, 2^45212523 is an apocalyptic number.

45212523 is a deficient number, since it is larger than the sum of its proper divisors (15070845).

45212523 is a wasteful number, since it uses less digits than its factorization.

45212523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15070844.

The product of its digits is 2400, while the sum is 24.

The square root of 45212523 is about 6724.0258030439. The cubic root of 45212523 is about 356.2483932214.

Adding to 45212523 its reverse (32521254), we get a palindrome (77733777).

The spelling of 45212523 in words is "forty-five million, two hundred twelve thousand, five hundred twenty-three".