172672550 has 12 divisors (see below), whose sum is σ = 321171036. Its totient is φ = 69069000.

The previous prime is 172672537. The next prime is 172672561. The reversal of 172672550 is 55276271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172672550.

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, 1726676 + ... + 1726775.

It is an arithmetic number, because the mean of its divisors is an integer number (26764253).

Almost surely, 2^172672550 is an apocalyptic number.

172672550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172672550 is a deficient number, since it is larger than the sum of its proper divisors (148498486).

172672550 is a wasteful number, since it uses less digits than its factorization.

172672550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453463 (or 3453458 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 172672550 is about 13140.4927609280. The cubic root of 172672550 is about 556.8536887382.

The spelling of 172672550 in words is "one hundred seventy-two million, six hundred seventy-two thousand, five hundred fifty".