83625551 has 4 divisors (see below), whose sum is σ = 83889672. Its totient is φ = 83361432.

The previous prime is 83625457. The next prime is 83625599. The reversal of 83625551 is 15552638.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83625551 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 (83625151) 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, 131585 + ... + 132218.

It is an arithmetic number, because the mean of its divisors is an integer number (20972418).

Almost surely, 2^83625551 is an apocalyptic number.

83625551 is a deficient number, since it is larger than the sum of its proper divisors (264121).

83625551 is a wasteful number, since it uses less digits than its factorization.

83625551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264120.

The product of its digits is 36000, while the sum is 35.

The square root of 83625551 is about 9144.7007058733. The cubic root of 83625551 is about 437.3001880497.

The spelling of 83625551 in words is "eighty-three million, six hundred twenty-five thousand, five hundred fifty-one".