1554221541 has 16 divisors (see below), whose sum is σ = 2129402880. Its totient is φ = 1007796720.

The previous prime is 1554221531. The next prime is 1554221561. The reversal of 1554221541 is 1451224551.

It is not a de Polignac number, because 1554221541 - 2⁶ = 1554221477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1554221499 and 1554221508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554221531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5626 + ... + 56036.

It is an arithmetic number, because the mean of its divisors is an integer number (133087680).

Almost surely, 2^1554221541 is an apocalyptic number.

It is an amenable number.

1554221541 is a deficient number, since it is larger than the sum of its proper divisors (575181339).

1554221541 is a wasteful number, since it uses less digits than its factorization.

1554221541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50696.

The product of its digits is 8000, while the sum is 30.

The square root of 1554221541 is about 39423.6165388210. The cubic root of 1554221541 is about 1158.3442342722.

The spelling of 1554221541 in words is "one billion, five hundred fifty-four million, two hundred twenty-one thousand, five hundred forty-one".