72021116 has 6 divisors (see below), whose sum is σ = 126036960. Its totient is φ = 36010556.

The previous prime is 72021109. The next prime is 72021121. The reversal of 72021116 is 61112027.

It is a super-2 number, since 2×72021116² = 10374082299770912, which contains 22 as substring.

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, 9002636 + ... + 9002643.

It is an arithmetic number, because the mean of its divisors is an integer number (21006160).

Almost surely, 2^72021116 is an apocalyptic number.

It is an amenable number.

72021116 is a deficient number, since it is larger than the sum of its proper divisors (54015844).

72021116 is a wasteful number, since it uses less digits than its factorization.

72021116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18005283 (or 18005281 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 72021116 is about 8486.5255552552. The cubic root of 72021116 is about 416.0574301260.

The spelling of 72021116 in words is "seventy-two million, twenty-one thousand, one hundred sixteen".