82785451 has 16 divisors (see below), whose sum is σ = 101632000. Its totient is φ = 67218984.

The previous prime is 82785433. The next prime is 82785457. The reversal of 82785451 is 15458728.

It is not a de Polignac number, because 82785451 - 2⁵ = 82785419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82785457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166 + ... + 12868.

It is an arithmetic number, because the mean of its divisors is an integer number (6352000).

Almost surely, 2^82785451 is an apocalyptic number.

82785451 is a deficient number, since it is larger than the sum of its proper divisors (18846549).

82785451 is a wasteful number, since it uses less digits than its factorization.

82785451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12743 (or 12729 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 82785451 is about 9098.6510538651. The cubic root of 82785451 is about 435.8308882488.

The spelling of 82785451 in words is "eighty-two million, seven hundred eighty-five thousand, four hundred fifty-one".