517172250 has 128 divisors (see below), whose sum is σ = 1539772416. Its totient is φ = 113044800.

The previous prime is 517172233. The next prime is 517172269. The reversal of 517172250 is 52271715.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118609 + ... + 122891.

It is an arithmetic number, because the mean of its divisors is an integer number (12029472).

Almost surely, 2^517172250 is an apocalyptic number.

517172250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 517172250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769886208).

517172250 is an abundant number, since it is smaller than the sum of its proper divisors (1022600166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517172250 is a wasteful number, since it uses less digits than its factorization.

517172250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 4323 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 517172250 is about 22741.4214595306. The cubic root of 517172250 is about 802.6848595398.

It can be divided in two parts, 5171 and 72250, that added together give a triangular number (77421 = T₃₉₃).

The spelling of 517172250 in words is "five hundred seventeen million, one hundred seventy-two thousand, two hundred fifty".