71481015 has 16 divisors (see below), whose sum is σ = 127077600. Its totient is φ = 38123136.

The previous prime is 71481013. The next prime is 71481019. The reversal of 71481015 is 51018417.

It is not a de Polignac number, because 71481015 - 2¹ = 71481013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 71481015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71481013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264610 + ... + 264879.

It is an arithmetic number, because the mean of its divisors is an integer number (7942350).

Almost surely, 2^71481015 is an apocalyptic number.

71481015 is a deficient number, since it is larger than the sum of its proper divisors (55596585).

71481015 is a wasteful number, since it uses less digits than its factorization.

71481015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529503 (or 529497 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 71481015 is about 8454.6445815303. The cubic root of 71481015 is about 415.0147863314.

The spelling of 71481015 in words is "seventy-one million, four hundred eighty-one thousand, fifteen".