1552216005721 has 8 divisors (see below), whose sum is σ = 1559099433600. Its totient is φ = 1545335818320.

The previous prime is 1552216005719. The next prime is 1552216005779. The reversal of 1552216005721 is 1275006122551.

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

It is a cyclic number.

It is not a de Polignac number, because 1552216005721 - 2¹ = 1552216005719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1552216005701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152551 + ... + 1768531.

It is an arithmetic number, because the mean of its divisors is an integer number (194887429200).

Almost surely, 2^{1552216005721} is an apocalyptic number.

It is an amenable number.

1552216005721 is a deficient number, since it is larger than the sum of its proper divisors (6883427879).

1552216005721 is a wasteful number, since it uses less digits than its factorization.

1552216005721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620239.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 1552216005721 in words is "one trillion, five hundred fifty-two billion, two hundred sixteen million, five thousand, seven hundred twenty-one".