72198550 has 12 divisors (see below), whose sum is σ = 134289396. Its totient is φ = 28879400.

The previous prime is 72198523. The next prime is 72198559. The reversal of 72198550 is 5589127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72198559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 721936 + ... + 722035.

It is an arithmetic number, because the mean of its divisors is an integer number (11190783).

Almost surely, 2^72198550 is an apocalyptic number.

72198550 is a deficient number, since it is larger than the sum of its proper divisors (62090846).

72198550 is a wasteful number, since it uses less digits than its factorization.

72198550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443983 (or 1443978 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 72198550 is about 8496.9729904243. The cubic root of 72198550 is about 416.3988216364.

The spelling of 72198550 in words is "seventy-two million, one hundred ninety-eight thousand, five hundred fifty".