23400543 has 4 divisors (see below), whose sum is σ = 31200728. Its totient is φ = 15600360.

The previous prime is 23400529. The next prime is 23400617. The reversal of 23400543 is 34500432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23400543 - 2¹² = 23396447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23400523) 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, 3900088 + ... + 3900093.

It is an arithmetic number, because the mean of its divisors is an integer number (7800182).

Almost surely, 2^23400543 is an apocalyptic number.

23400543 is a deficient number, since it is larger than the sum of its proper divisors (7800185).

23400543 is an equidigital number, since it uses as much as digits as its factorization.

23400543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800184.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 23400543 is about 4837.4107743709. The cubic root of 23400543 is about 286.0280630034.

Adding to 23400543 its reverse (34500432), we get a palindrome (57900975).

It can be divided in two parts, 2 and 3400543, that multiplied together give a palindrome (6801086).

The spelling of 23400543 in words is "twenty-three million, four hundred thousand, five hundred forty-three".