217050425 has 24 divisors (see below), whose sum is σ = 282333120. Its totient is φ = 165211200.

The previous prime is 217050403. The next prime is 217050443. The reversal of 217050425 is 524050712.

It is a de Polignac number, because none of the positive numbers 2^k-217050425 is a prime.

It is a super-2 number, since 2×217050425² = 94221773985361250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217050394 and 217050403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120431 + ... + 122219.

It is an arithmetic number, because the mean of its divisors is an integer number (11763880).

Almost surely, 2^217050425 is an apocalyptic number.

217050425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

217050425 is a deficient number, since it is larger than the sum of its proper divisors (65282695).

217050425 is a wasteful number, since it uses less digits than its factorization.

217050425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2028 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 217050425 is about 14732.6312992622. The cubic root of 217050425 is about 600.9710433510.

The spelling of 217050425 in words is "two hundred seventeen million, fifty thousand, four hundred twenty-five".