72551 has 2 divisors, whose sum is σ = 72552. Its totient is φ = 72550.

The previous prime is 72547. The next prime is 72559. The reversal of 72551 is 15527.

It is a weak prime.

It is an emirp because it is prime and its reverse (15527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72551 - 2² = 72547 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 72551.

It is not a weakly prime, because it can be changed into another prime (72559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36275 + 36276.

It is an arithmetic number, because the mean of its divisors is an integer number (36276).

2⁷²⁵⁵¹ is an apocalyptic number.

72551 is a deficient number, since it is larger than the sum of its proper divisors (1).

72551 is an equidigital number, since it uses as much as digits as its factorization.

72551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 350, while the sum is 20.

The square root of 72551 is about 269.3529283301. The cubic root of 72551 is about 41.7075296898.

The spelling of 72551 in words is "seventy-two thousand, five hundred fifty-one".