82151284 has 6 divisors (see below), whose sum is σ = 143764754. Its totient is φ = 41075640.

The previous prime is 82151273. The next prime is 82151297. The reversal of 82151284 is 48215128.

It can be written as a sum of positive squares in only one way, i.e., 41319184 + 40832100 = 6428^2 + 6390^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268907 + ... + 10268914.

Almost surely, 2^82151284 is an apocalyptic number.

It is an amenable number.

82151284 is a deficient number, since it is larger than the sum of its proper divisors (61613470).

82151284 is a wasteful number, since it uses less digits than its factorization.

82151284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20537825 (or 20537823 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 82151284 is about 9063.7345503937. The cubic root of 82151284 is about 434.7151594540.

The spelling of 82151284 in words is "eighty-two million, one hundred fifty-one thousand, two hundred eighty-four".