55143012 has 12 divisors (see below), whose sum is σ = 128667056. Its totient is φ = 18381000.

The previous prime is 55142999. The next prime is 55143041. The reversal of 55143012 is 21034155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×55143012³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55143012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2297614 + ... + 2297637.

Almost surely, 2^55143012 is an apocalyptic number.

It is an amenable number.

55143012 is an abundant number, since it is smaller than the sum of its proper divisors (73524044).

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

55143012 is a wasteful number, since it uses less digits than its factorization.

55143012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4595258 (or 4595256 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55143012 is about 7425.8340945647. The cubic root of 55143012 is about 380.6245776673.

Adding to 55143012 its reverse (21034155), we get a palindrome (76177167).

The spelling of 55143012 in words is "fifty-five million, one hundred forty-three thousand, twelve".