72103550 has 12 divisors (see below), whose sum is σ = 134112696. Its totient is φ = 28841400.

The previous prime is 72103531. The next prime is 72103571. The reversal of 72103550 is 5530127.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720986 + ... + 721085.

It is an arithmetic number, because the mean of its divisors is an integer number (11176058).

Almost surely, 2^72103550 is an apocalyptic number.

72103550 is a deficient number, since it is larger than the sum of its proper divisors (62009146).

72103550 is a wasteful number, since it uses less digits than its factorization.

72103550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442083 (or 1442078 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 72103550 is about 8491.3809242078. The cubic root of 72103550 is about 416.2161067432.

Adding to 72103550 its reverse (5530127), we get a palindrome (77633677).

The spelling of 72103550 in words is "seventy-two million, one hundred three thousand, five hundred fifty".