71552291 has 4 divisors (see below), whose sum is σ = 72221112. Its totient is φ = 70883472.

The previous prime is 71552267. The next prime is 71552293. The reversal of 71552291 is 19225517.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19225517 = 541 ⋅35537.

It is a cyclic number.

It is not a de Polignac number, because 71552291 - 2²² = 67357987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71552293) 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, 334250 + ... + 334463.

It is an arithmetic number, because the mean of its divisors is an integer number (18055278).

Almost surely, 2^71552291 is an apocalyptic number.

71552291 is a deficient number, since it is larger than the sum of its proper divisors (668821).

71552291 is a wasteful number, since it uses less digits than its factorization.

71552291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668820.

The product of its digits is 6300, while the sum is 32.

The square root of 71552291 is about 8458.8587291667. The cubic root of 71552291 is about 415.1526820018.

The spelling of 71552291 in words is "seventy-one million, five hundred fifty-two thousand, two hundred ninety-one".