72554551 has 2 divisors, whose sum is σ = 72554552. Its totient is φ = 72554550.

The previous prime is 72554527. The next prime is 72554593. The reversal of 72554551 is 15545527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72554551 - 2⁵ = 72554519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72554851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36277275 + 36277276.

It is an arithmetic number, because the mean of its divisors is an integer number (36277276).

Almost surely, 2^72554551 is an apocalyptic number.

72554551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72554551 is an equidigital number, since it uses as much as digits as its factorization.

72554551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35000, while the sum is 34.

The square root of 72554551 is about 8517.8959256380. The cubic root of 72554551 is about 417.0821013538.

The spelling of 72554551 in words is "seventy-two million, five hundred fifty-four thousand, five hundred fifty-one".