83581772 has 6 divisors (see below), whose sum is σ = 146268108. Its totient is φ = 41790884.

The previous prime is 83581727. The next prime is 83581777. The reversal of 83581772 is 27718538.

It is a super-2 number, since 2×83581772² = 13971825221319968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83581777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447718 + ... + 10447725.

It is an arithmetic number, because the mean of its divisors is an integer number (24378018).

Almost surely, 2^83581772 is an apocalyptic number.

It is an amenable number.

83581772 is a deficient number, since it is larger than the sum of its proper divisors (62686336).

83581772 is a wasteful number, since it uses less digits than its factorization.

83581772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20895447 (or 20895445 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 83581772 is about 9142.3067111096. The cubic root of 83581772 is about 437.2238640615.

The spelling of 83581772 in words is "eighty-three million, five hundred eighty-one thousand, seven hundred seventy-two".