1554224404 has 12 divisors (see below), whose sum is σ = 2747933524. Its totient is φ = 769100544.

The previous prime is 1554224389. The next prime is 1554224407. The reversal of 1554224404 is 4044224551.

It can be written as a sum of positive squares in 2 ways, for example, as 855679504 + 698544900 = 29252^2 + 26430^2 .

It is a super-2 number, since 2×1554224404² = 4831226995978310432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554224407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002479 + ... + 2003254.

Almost surely, 2^1554224404 is an apocalyptic number.

It is an amenable number.

1554224404 is a deficient number, since it is larger than the sum of its proper divisors (1193709120).

1554224404 is a wasteful number, since it uses less digits than its factorization.

1554224404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005834 (or 4005832 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The square root of 1554224404 is about 39423.6528495268. The cubic root of 1554224404 is about 1158.3449455259.

Adding to 1554224404 its reverse (4044224551), we get a palindrome (5598448955).

The spelling of 1554224404 in words is "one billion, five hundred fifty-four million, two hundred twenty-four thousand, four hundred four".