82961515 has 16 divisors (see below), whose sum is σ = 122528448. Its totient is φ = 52511616.

The previous prime is 82961503. The next prime is 82961537. The reversal of 82961515 is 51516928.

It is a cyclic number.

It is not a de Polignac number, because 82961515 - 2⁷ = 82961387 is a prime.

It is a super-2 number, since 2×82961515² = 13765225942190450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90712 + ... + 91621.

It is an arithmetic number, because the mean of its divisors is an integer number (7658028).

Almost surely, 2^82961515 is an apocalyptic number.

82961515 is a deficient number, since it is larger than the sum of its proper divisors (39566933).

82961515 is a wasteful number, since it uses less digits than its factorization.

82961515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182358.

The product of its digits is 21600, while the sum is 37.

The square root of 82961515 is about 9108.3211954783. The cubic root of 82961515 is about 436.1396373291.

The spelling of 82961515 in words is "eighty-two million, nine hundred sixty-one thousand, five hundred fifteen".