4021143550 has 24 divisors (see below), whose sum is σ = 7481257776. Its totient is φ = 1608042240.

The previous prime is 4021143547. The next prime is 4021143559. The reversal of 4021143550 is 553411204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021143559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249847 + ... + 265453.

It is an arithmetic number, because the mean of its divisors is an integer number (311719074).

Almost surely, 2^4021143550 is an apocalyptic number.

4021143550 is a deficient number, since it is larger than the sum of its proper divisors (3460114226).

4021143550 is a wasteful number, since it uses less digits than its factorization.

4021143550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20772 (or 20767 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 4021143550 is about 63412.4873349090. The cubic root of 4021143550 is about 1590.1930794099.

Adding to 4021143550 its reverse (553411204), we get a palindrome (4574554754).

The spelling of 4021143550 in words is "four billion, twenty-one million, one hundred forty-three thousand, five hundred fifty".