71550145 has 8 divisors (see below), whose sum is σ = 86086656. Its totient is φ = 57089136.

The previous prime is 71550137. The next prime is 71550169. The reversal of 71550145 is 54105517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71550145 - 2³ = 71550137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16767 + ... + 20596.

It is an arithmetic number, because the mean of its divisors is an integer number (10760832).

Almost surely, 2^71550145 is an apocalyptic number.

It is an amenable number.

71550145 is a deficient number, since it is larger than the sum of its proper divisors (14536511).

71550145 is a wasteful number, since it uses less digits than its factorization.

71550145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37751.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 71550145 is about 8458.7318789521. The cubic root of 71550145 is about 415.1485315334.

The spelling of 71550145 in words is "seventy-one million, five hundred fifty thousand, one hundred forty-five".