2571221742 has 8 divisors (see below), whose sum is σ = 5142443496. Its totient is φ = 857073912.

The previous prime is 2571221717. The next prime is 2571221743. The reversal of 2571221742 is 2471221752.

It is a sphenic number, since it is the product of 3 distinct primes.

2571221742 is an admirable number.

It is a super-2 number, since 2×2571221742² = 13222362493067029128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2571221743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214268473 + ... + 214268484.

It is an arithmetic number, because the mean of its divisors is an integer number (642805437).

Almost surely, 2^2571221742 is an apocalyptic number.

2571221742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2571221742 is a wasteful number, since it uses less digits than its factorization.

2571221742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428536962.

The product of its digits is 15680, while the sum is 33.

The square root of 2571221742 is about 50707.2158770327. The cubic root of 2571221742 is about 1369.9766884697.

The spelling of 2571221742 in words is "two billion, five hundred seventy-one million, two hundred twenty-one thousand, seven hundred forty-two".