55394143 has 32 divisors (see below), whose sum is σ = 71967744. Its totient is φ = 41513472.

The previous prime is 55394113. The next prime is 55394149. The reversal of 55394143 is 34149355.

It is not a de Polignac number, because 55394143 - 2⁵ = 55394111 is a prime.

It is a super-2 number, since 2×55394143² = 6137022157408898, 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 = 55394099 and 55394108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55394149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100996 + ... + 101542.

It is an arithmetic number, because the mean of its divisors is an integer number (2248992).

Almost surely, 2^55394143 is an apocalyptic number.

55394143 is a deficient number, since it is larger than the sum of its proper divisors (16573601).

55394143 is a wasteful number, since it uses less digits than its factorization.

55394143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 32400, while the sum is 34.

The square root of 55394143 is about 7442.7241652502. The cubic root of 55394143 is about 381.2015132103.

The spelling of 55394143 in words is "fifty-five million, three hundred ninety-four thousand, one hundred forty-three".