1554221241 has 6 divisors (see below), whose sum is σ = 2244986250. Its totient is φ = 1036147488.

The previous prime is 1554221233. The next prime is 1554221267. The reversal of 1554221241 is 1421224551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1369370025 + 184851216 = 37005^2 + 13596^2 .

It is not a de Polignac number, because 1554221241 - 2³ = 1554221233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1554221341) 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, 86345616 + ... + 86345633.

It is an arithmetic number, because the mean of its divisors is an integer number (374164375).

Almost surely, 2^1554221241 is an apocalyptic number.

It is an amenable number.

1554221241 is a deficient number, since it is larger than the sum of its proper divisors (690765009).

1554221241 is a wasteful number, since it uses less digits than its factorization.

1554221241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172691255 (or 172691252 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1554221241 is about 39423.6127339948. The cubic root of 1554221241 is about 1158.3441597433.

Adding to 1554221241 its reverse (1421224551), we get a palindrome (2975445792).

The spelling of 1554221241 in words is "one billion, five hundred fifty-four million, two hundred twenty-one thousand, two hundred forty-one".