55400542 has 16 divisors (see below), whose sum is σ = 88462800. Its totient is φ = 25945920.

The previous prime is 55400539. The next prime is 55400549. The reversal of 55400542 is 24500455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4809 + ... + 11572.

It is an arithmetic number, because the mean of its divisors is an integer number (5528925).

Almost surely, 2^55400542 is an apocalyptic number.

55400542 is a deficient number, since it is larger than the sum of its proper divisors (33062258).

55400542 is a wasteful number, since it uses less digits than its factorization.

55400542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16491.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55400542 is about 7443.1540357566. The cubic root of 55400542 is about 381.2161911433.

Adding to 55400542 its reverse (24500455), we get a palindrome (79900997).

The spelling of 55400542 in words is "fifty-five million, four hundred thousand, five hundred forty-two".