517997450 has 12 divisors (see below), whose sum is σ = 963475350. Its totient is φ = 207198960.

The previous prime is 517997423. The next prime is 517997453. The reversal of 517997450 is 54799715.

It can be written as a sum of positive squares in 3 ways, for example, as 427538329 + 90459121 = 20677^2 + 9511^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 517997395 and 517997404.

It is not an unprimeable number, because it can be changed into a prime (517997453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5179925 + ... + 5180024.

Almost surely, 2^517997450 is an apocalyptic number.

517997450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

517997450 is a deficient number, since it is larger than the sum of its proper divisors (445477900).

517997450 is a wasteful number, since it uses less digits than its factorization.

517997450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359961 (or 10359956 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 47.

The square root of 517997450 is about 22759.5573331293. The cubic root of 517997450 is about 803.1115539745. Note that the first 3 decimals are identical.

The spelling of 517997450 in words is "five hundred seventeen million, nine hundred ninety-seven thousand, four hundred fifty".