72554451 has 8 divisors (see below), whose sum is σ = 96778704. Its totient is φ = 48349920.

The previous prime is 72554431. The next prime is 72554473. The reversal of 72554451 is 15445527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-72554451 is a prime.

It is a super-2 number, since 2×72554451² = 10528296719822802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72554431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11161 + ... + 16421.

It is an arithmetic number, because the mean of its divisors is an integer number (12097338).

Almost surely, 2^72554451 is an apocalyptic number.

72554451 is a deficient number, since it is larger than the sum of its proper divisors (24224253).

72554451 is a wasteful number, since it uses less digits than its factorization.

72554451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9861.

The product of its digits is 28000, while the sum is 33.

The square root of 72554451 is about 8517.8900556417. The cubic root of 72554451 is about 417.0819097360.

Adding to 72554451 its reverse (15445527), we get a palindrome (87999978).

The spelling of 72554451 in words is "seventy-two million, five hundred fifty-four thousand, four hundred fifty-one".