55542774 has 48 divisors (see below), whose sum is σ = 136835568. Its totient is φ = 14934528.

The previous prime is 55542763. The next prime is 55542779. The reversal of 55542774 is 47724555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55542779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (2850741).

Almost surely, 2^55542774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55542774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68417784).

55542774 is an abundant number, since it is smaller than the sum of its proper divisors (81292794).

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

55542774 is a wasteful number, since it uses less digits than its factorization.

55542774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149 (or 11142 counting only the distinct ones).

The product of its digits is 196000, while the sum is 39.

The square root of 55542774 is about 7452.7024628654. The cubic root of 55542774 is about 381.5421494827.

The spelling of 55542774 in words is "fifty-five million, five hundred forty-two thousand, seven hundred seventy-four".