55105542 has 32 divisors (see below), whose sum is σ = 122866560. Its totient is φ = 18307080.

The previous prime is 55105541. The next prime is 55105559. The reversal of 55105542 is 24550155.

It is a super-2 number, since 2×55105542² = 6073241518227528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105541) 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, 16333 + ... + 19415.

It is an arithmetic number, because the mean of its divisors is an integer number (3839580).

Almost surely, 2^55105542 is an apocalyptic number.

55105542 is an abundant number, since it is smaller than the sum of its proper divisors (67761018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55105542 is a wasteful number, since it uses less digits than its factorization.

55105542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3419 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55105542 is about 7423.3107169241. The cubic root of 55105542 is about 380.5383459219.

Adding to 55105542 its reverse (24550155), we get a palindrome (79655697).

The spelling of 55105542 in words is "fifty-five million, one hundred five thousand, five hundred forty-two".