71221704 has 64 divisors (see below), whose sum is σ = 189604800. Its totient is φ = 22216704.

The previous prime is 71221697. The next prime is 71221723. The reversal of 71221704 is 40712217.

It is a super-2 number, since 2×71221704² = 10145062241327232, which contains 22 as substring.

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

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, 92232 + ... + 93000.

It is an arithmetic number, because the mean of its divisors is an integer number (2962575).

Almost surely, 2^71221704 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 71221704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94802400).

71221704 is an abundant number, since it is smaller than the sum of its proper divisors (118383096).

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

71221704 is a wasteful number, since it uses less digits than its factorization.

71221704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 71221704 is about 8439.2952312382. The cubic root of 71221704 is about 414.5123298541.

The spelling of 71221704 in words is "seventy-one million, two hundred twenty-one thousand, seven hundred four".