71073551 has 4 divisors (see below), whose sum is σ = 71368704. Its totient is φ = 70778400.

The previous prime is 71073523. The next prime is 71073631. The reversal of 71073551 is 15537017.

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 71073551 - 2¹⁰ = 71072527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71073521) 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, 147215 + ... + 147696.

It is an arithmetic number, because the mean of its divisors is an integer number (17842176).

Almost surely, 2^71073551 is an apocalyptic number.

71073551 is a deficient number, since it is larger than the sum of its proper divisors (295153).

71073551 is a wasteful number, since it uses less digits than its factorization.

71073551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295152.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 71073551 is about 8430.5130923331. The cubic root of 71073551 is about 414.2247121154.

The spelling of 71073551 in words is "seventy-one million, seventy-three thousand, five hundred fifty-one".