55401242 has 12 divisors (see below), whose sum is σ = 89986590. Its totient is φ = 25569648.

The previous prime is 55401217. The next prime is 55401251. The reversal of 55401242 is 24210455.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29278921 + 26122321 = 5411^2 + 5111^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81617 + ... + 82292.

Almost surely, 2^55401242 is an apocalyptic number.

55401242 is a deficient number, since it is larger than the sum of its proper divisors (34585348).

55401242 is a wasteful number, since it uses less digits than its factorization.

55401242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163937 (or 163924 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 55401242 is about 7443.2010586844. The cubic root of 55401242 is about 381.2177967245.

Adding to 55401242 its reverse (24210455), we get a palindrome (79611697).

The spelling of 55401242 in words is "fifty-five million, four hundred one thousand, two hundred forty-two".