72216548 has 6 divisors (see below), whose sum is σ = 126378966. Its totient is φ = 36108272.

The previous prime is 72216541. The next prime is 72216631. The reversal of 72216548 is 84561227.

It can be written as a sum of positive squares in only one way, i.e., 54051904 + 18164644 = 7352^2 + 4262^2 .

It is not an unprimeable number, because it can be changed into a prime (72216541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027065 + ... + 9027072.

It is an arithmetic number, because the mean of its divisors is an integer number (21063161).

Almost surely, 2^72216548 is an apocalyptic number.

It is an amenable number.

72216548 is a deficient number, since it is larger than the sum of its proper divisors (54162418).

72216548 is a wasteful number, since it uses less digits than its factorization.

72216548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18054141 (or 18054139 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 72216548 is about 8498.0320074709. The cubic root of 72216548 is about 416.4334193918.

The spelling of 72216548 in words is "seventy-two million, two hundred sixteen thousand, five hundred forty-eight".