1552315454221 has 6 divisors (see below), whose sum is σ = 1805754712110. Its totient is φ = 1330556103576.

The previous prime is 1552315454153. The next prime is 1552315454231. The reversal of 1552315454221 is 1224545132551.

It can be written as a sum of positive squares in only one way, i.e., 1136225951721 + 416089502500 = 1065939^2 + 645050^2 .

It is not a de Polignac number, because 1552315454221 - 2⁷ = 1552315454093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552315454231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15839953566 + ... + 15839953663.

It is an arithmetic number, because the mean of its divisors is an integer number (300959118685).

Almost surely, 2^{1552315454221} is an apocalyptic number.

It is an amenable number.

1552315454221 is a deficient number, since it is larger than the sum of its proper divisors (253439257889).

1552315454221 is an equidigital number, since it uses as much as digits as its factorization.

1552315454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31679907243 (or 31679907236 counting only the distinct ones).

The product of its digits is 240000, while the sum is 40.

The spelling of 1552315454221 in words is "one trillion, five hundred fifty-two billion, three hundred fifteen million, four hundred fifty-four thousand, two hundred twenty-one".