55143031 has 4 divisors (see below), whose sum is σ = 55159200. Its totient is φ = 55126864.

The previous prime is 55142999. The next prime is 55143041. The reversal of 55143031 is 13034155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55143031 - 2⁵ = 55142999 is a prime.

It is a super-2 number, since 2×55143031² = 6081507735733922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55142993 and 55143011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751 + ... + 10528.

It is an arithmetic number, because the mean of its divisors is an integer number (13789800).

Almost surely, 2^55143031 is an apocalyptic number.

55143031 is a deficient number, since it is larger than the sum of its proper divisors (16169).

55143031 is a wasteful number, since it uses less digits than its factorization.

55143031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16168.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 55143031 is about 7425.8353738822. The cubic root of 55143031 is about 380.6246213831.

Adding to 55143031 its reverse (13034155), we get a palindrome (68177186).

The spelling of 55143031 in words is "fifty-five million, one hundred forty-three thousand, thirty-one".