71440215 has 48 divisors (see below), whose sum is σ = 143614464. Its totient is φ = 29684160.

The previous prime is 71440189. The next prime is 71440217. The reversal of 71440215 is 51204417.

It is not a de Polignac number, because 71440215 - 2⁵ = 71440183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9894 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (2991968).

Almost surely, 2^71440215 is an apocalyptic number.

71440215 is an abundant number, since it is smaller than the sum of its proper divisors (72174249).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71440215 is a wasteful number, since it uses less digits than its factorization.

71440215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660 (or 5649 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 71440215 is about 8452.2313621907. The cubic root of 71440215 is about 414.9358104621.

It can be divided in two parts, 714402 and 15, that added together give a palindrome (714417).

The spelling of 71440215 in words is "seventy-one million, four hundred forty thousand, two hundred fifteen".