55642012 has 6 divisors (see below), whose sum is σ = 97373528. Its totient is φ = 27821004.

The previous prime is 55642007. The next prime is 55642019. The reversal of 55642012 is 21024655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55642019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6955248 + ... + 6955255.

Almost surely, 2^55642012 is an apocalyptic number.

It is an amenable number.

55642012 is a deficient number, since it is larger than the sum of its proper divisors (41731516).

55642012 is a wasteful number, since it uses less digits than its factorization.

55642012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910507 (or 13910505 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55642012 is about 7459.3573449728. The cubic root of 55642012 is about 381.7692474428.

Adding to 55642012 its reverse (21024655), we get a palindrome (76666667).

The spelling of 55642012 in words is "fifty-five million, six hundred forty-two thousand, twelve".