71319553 has 8 divisors (see below), whose sum is σ = 72662760. Its totient is φ = 69982080.

The previous prime is 71319511. The next prime is 71319581. The reversal of 71319553 is 35591317.

It can be written as a sum of positive squares in 4 ways, for example, as 4194304 + 67125249 = 2048^2 + 8193^2 .

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 71319553 - 2⁹ = 71319041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71313553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29901 + ... + 32197.

It is an arithmetic number, because the mean of its divisors is an integer number (9082845).

It is a Proth number, since it is equal to 4353 ⋅ 2¹⁴ + 1 and 4353 < 2¹⁴.

Almost surely, 2^71319553 is an apocalyptic number.

It is an amenable number.

71319553 is a deficient number, since it is larger than the sum of its proper divisors (1343207).

71319553 is a wasteful number, since it uses less digits than its factorization.

71319553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

The product of its digits is 14175, while the sum is 34.

The square root of 71319553 is about 8445.0904672478. The cubic root of 71319553 is about 414.7020709694.

The spelling of 71319553 in words is "seventy-one million, three hundred nineteen thousand, five hundred fifty-three".