55542340 has 48 divisors (see below), whose sum is σ = 133725312. Its totient is φ = 18982656.

The previous prime is 55542329. The next prime is 55542341. The reversal of 55542340 is 4324555.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 55542299 and 55542308.

It is not an unprimeable number, because it can be changed into a prime (55542341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86059 + ... + 86701.

It is an arithmetic number, because the mean of its divisors is an integer number (2785944).

Almost surely, 2^55542340 is an apocalyptic number.

It is an amenable number.

55542340 is an abundant number, since it is smaller than the sum of its proper divisors (78182972).

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

55542340 is a wasteful number, since it uses less digits than its factorization.

55542340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 55542340 is about 7452.6733458538. The cubic root of 55542340 is about 381.5411557157.

Adding to 55542340 its reverse (4324555), we get a palindrome (59866895).

The spelling of 55542340 in words is "fifty-five million, five hundred forty-two thousand, three hundred forty".