72554543 has 4 divisors (see below), whose sum is σ = 74324208. Its totient is φ = 70784880.

The previous prime is 72554527. The next prime is 72554551. The reversal of 72554543 is 34545527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34545527 = 283 ⋅122069.

It is a cyclic number.

It is not a de Polignac number, because 72554543 - 2⁴ = 72554527 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 (72554593) 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, 884771 + ... + 884852.

It is an arithmetic number, because the mean of its divisors is an integer number (18581052).

Almost surely, 2^72554543 is an apocalyptic number.

72554543 is a deficient number, since it is larger than the sum of its proper divisors (1769665).

72554543 is a wasteful number, since it uses less digits than its factorization.

72554543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769664.

The product of its digits is 84000, while the sum is 35.

The square root of 72554543 is about 8517.8954560384. The cubic root of 72554543 is about 417.0820860243.

The spelling of 72554543 in words is "seventy-two million, five hundred fifty-four thousand, five hundred forty-three".