82774215 has 12 divisors (see below), whose sum is σ = 143475384. Its totient is φ = 44146224.

The previous prime is 82774201. The next prime is 82774229. The reversal of 82774215 is 51247728.

It is an interprime number because it is at equal distance from previous prime (82774201) and next prime (82774229).

It is not a de Polignac number, because 82774215 - 2⁶ = 82774151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82774215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919669 + ... + 919758.

It is an arithmetic number, because the mean of its divisors is an integer number (11956282).

Almost surely, 2^82774215 is an apocalyptic number.

82774215 is a deficient number, since it is larger than the sum of its proper divisors (60701169).

82774215 is a wasteful number, since it uses less digits than its factorization.

82774215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839438 (or 1839435 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 82774215 is about 9098.0335787466. The cubic root of 82774215 is about 435.8111697380.

The spelling of 82774215 in words is "eighty-two million, seven hundred seventy-four thousand, two hundred fifteen".