72554147 has 4 divisors (see below), whose sum is σ = 76822056. Its totient is φ = 68286240.

The previous prime is 72554137. The next prime is 72554159. The reversal of 72554147 is 74145527.

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 72554147 - 2¹⁰ = 72553123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72554117) 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, 2133929 + ... + 2133962.

It is an arithmetic number, because the mean of its divisors is an integer number (19205514).

Almost surely, 2^72554147 is an apocalyptic number.

72554147 is a deficient number, since it is larger than the sum of its proper divisors (4267909).

72554147 is a wasteful number, since it uses less digits than its factorization.

72554147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267908.

The product of its digits is 39200, while the sum is 35.

The square root of 72554147 is about 8517.8722108282. The cubic root of 72554147 is about 417.0813272168.

It can be divided in two parts, 725 and 54147, that added together give a cube (54872 = 38³).

The spelling of 72554147 in words is "seventy-two million, five hundred fifty-four thousand, one hundred forty-seven".