55402143 has 8 divisors (see below), whose sum is σ = 75441408. Its totient is φ = 36148824.

The previous prime is 55402129. The next prime is 55402153. The reversal of 55402143 is 34120455.

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

It is not a de Polignac number, because 55402143 - 2⁶ = 55402079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196321 + ... + 196602.

It is an arithmetic number, because the mean of its divisors is an integer number (9430176).

Almost surely, 2^55402143 is an apocalyptic number.

55402143 is a deficient number, since it is larger than the sum of its proper divisors (20039265).

55402143 is a wasteful number, since it uses less digits than its factorization.

55402143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392973.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55402143 is about 7443.2615834727. The cubic root of 55402143 is about 381.2198633170.

Adding to 55402143 its reverse (34120455), we get a palindrome (89522598).

The spelling of 55402143 in words is "fifty-five million, four hundred two thousand, one hundred forty-three".