55142404 has 6 divisors (see below), whose sum is σ = 96499214. Its totient is φ = 27571200.

The previous prime is 55142401. The next prime is 55142429. The reversal of 55142404 is 40424155.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48330304 + 6812100 = 6952^2 + 2610^2 .

It is not an unprimeable number, because it can be changed into a prime (55142401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6892797 + ... + 6892804.

Almost surely, 2^55142404 is an apocalyptic number.

It is an amenable number.

55142404 is a deficient number, since it is larger than the sum of its proper divisors (41356810).

55142404 is a wasteful number, since it uses less digits than its factorization.

55142404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785605 (or 13785603 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 55142404 is about 7425.7931562898. The cubic root of 55142404 is about 380.6231787557.

Adding to 55142404 its reverse (40424155), we get a palindrome (95566559).

The spelling of 55142404 in words is "fifty-five million, one hundred forty-two thousand, four hundred four".