71520203 has 4 divisors (see below), whose sum is σ = 71890968. Its totient is φ = 71149440.

The previous prime is 71520181. The next prime is 71520233. The reversal of 71520203 is 30202517.

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

It is a cyclic number.

It is not a de Polignac number, because 71520203 - 2¹⁶ = 71454667 is a prime.

It is a super-2 number, since 2×71520203² = 10230278874322418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71520233) 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, 185093 + ... + 185478.

It is an arithmetic number, because the mean of its divisors is an integer number (17972742).

Almost surely, 2^71520203 is an apocalyptic number.

71520203 is a deficient number, since it is larger than the sum of its proper divisors (370765).

71520203 is a wasteful number, since it uses less digits than its factorization.

71520203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370764.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 71520203 is about 8456.9618067010. The cubic root of 71520203 is about 415.0906135903.

The spelling of 71520203 in words is "seventy-one million, five hundred twenty thousand, two hundred three".