2721106505 has 16 divisors (see below), whose sum is σ = 3521946960. Its totient is φ = 2006323968.

The previous prime is 2721106481. The next prime is 2721106543. The reversal of 2721106505 is 5056011272.

It can be written as a sum of positive squares in 8 ways, for example, as 7946761 + 2713159744 = 2819^2 + 52088^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721106505 - 2⁶ = 2721106441 is a prime.

It is a super-2 number, since 2×2721106505² = 14808841223106630050, which contains 22 as substring.

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, 10391 + ... + 74499.

It is an arithmetic number, because the mean of its divisors is an integer number (220121685).

Almost surely, 2^2721106505 is an apocalyptic number.

It is an amenable number.

2721106505 is a deficient number, since it is larger than the sum of its proper divisors (800840455).

2721106505 is a wasteful number, since it uses less digits than its factorization.

2721106505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64780.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 2721106505 is about 52164.2262954220. The cubic root of 2721106505 is about 1396.0956701688.

Adding to 2721106505 its reverse (5056011272), we get a palindrome (7777117777).

The spelling of 2721106505 in words is "two billion, seven hundred twenty-one million, one hundred six thousand, five hundred five".