55133143 has 8 divisors (see below), whose sum is σ = 59704736. Its totient is φ = 50608800.

The previous prime is 55133137. The next prime is 55133153. The reversal of 55133143 is 34133155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55133143 - 2²¹ = 53035991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55133123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9363 + ... + 14068.

It is an arithmetic number, because the mean of its divisors is an integer number (7463092).

Almost surely, 2^55133143 is an apocalyptic number.

55133143 is a deficient number, since it is larger than the sum of its proper divisors (4571593).

55133143 is a wasteful number, since it uses less digits than its factorization.

55133143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23625.

The product of its digits is 2700, while the sum is 25.

The square root of 55133143 is about 7425.1695603535. The cubic root of 55133143 is about 380.6018693921.

Adding to 55133143 its reverse (34133155), we get a palindrome (89266298).

The spelling of 55133143 in words is "fifty-five million, one hundred thirty-three thousand, one hundred forty-three".