23212545 has 16 divisors (see below), whose sum is σ = 37426752. Its totient is φ = 12284480.

The previous prime is 23212537. The next prime is 23212549. The reversal of 23212545 is 54521232.

It is not a de Polignac number, because 23212545 - 2³ = 23212537 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23212549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3942 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (2339172).

Almost surely, 2^23212545 is an apocalyptic number.

It is an amenable number.

23212545 is a deficient number, since it is larger than the sum of its proper divisors (14214207).

23212545 is a wasteful number, since it uses less digits than its factorization.

23212545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952.

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

The square root of 23212545 is about 4817.9399124522. The cubic root of 23212545 is about 285.2600273817.

Adding to 23212545 its reverse (54521232), we get a palindrome (77733777).

The spelling of 23212545 in words is "twenty-three million, two hundred twelve thousand, five hundred forty-five".