71553245 has 8 divisors (see below), whose sum is σ = 85949016. Its totient is φ = 57185856.

The previous prime is 71553217. The next prime is 71553269. The reversal of 71553245 is 54235517.

It can be written as a sum of positive squares in 4 ways, for example, as 43112356 + 28440889 = 6566^2 + 5333^2 .

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 71553245 - 2²⁰ = 70504669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (10743627).

Almost surely, 2^71553245 is an apocalyptic number.

It is an amenable number.

71553245 is a deficient number, since it is larger than the sum of its proper divisors (14395771).

71553245 is a wasteful number, since it uses less digits than its factorization.

71553245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14191.

The product of its digits is 21000, while the sum is 32.

The square root of 71553245 is about 8458.9151195647. The cubic root of 71553245 is about 415.1545270575.

The spelling of 71553245 in words is "seventy-one million, five hundred fifty-three thousand, two hundred forty-five".