2571216 has 80 divisors (see below), whose sum is σ = 7392384. Its totient is φ = 765952.

The previous prime is 2571209. The next prime is 2571269. The reversal of 2571216 is 6121752.

It is a super-2 number, since 2×2571216² = 13222303437312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18700 + ... + 18836.

2^2571216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2571216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3696192).

2571216 is an abundant number, since it is smaller than the sum of its proper divisors (4821168).

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

2571216 is a wasteful number, since it uses less digits than its factorization.

2571216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 182 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 2571216 is about 1603.5011693167. The cubic root of 2571216 is about 136.9975668668.

Adding to 2571216 its reverse (6121752), we get a palindrome (8692968).

The spelling of 2571216 in words is "two million, five hundred seventy-one thousand, two hundred sixteen".