75471217 has 4 divisors (see below), whose sum is σ = 75513060. Its totient is φ = 75429376.

The previous prime is 75471203. The next prime is 75471229. The reversal of 75471217 is 71217457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46730896 + 28740321 = 6836^2 + 5361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75471217 is a prime.

It is a super-2 number, since 2×75471217² = 11391809190922178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75471017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18088 + ... + 21865.

It is an arithmetic number, because the mean of its divisors is an integer number (18878265).

Almost surely, 2^75471217 is an apocalyptic number.

It is an amenable number.

75471217 is a deficient number, since it is larger than the sum of its proper divisors (41843).

75471217 is a wasteful number, since it uses less digits than its factorization.

75471217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41842.

The product of its digits is 13720, while the sum is 34.

The square root of 75471217 is about 8687.4171650727. The cubic root of 75471217 is about 422.5976889757.

The spelling of 75471217 in words is "seventy-five million, four hundred seventy-one thousand, two hundred seventeen".