2001233542 has 64 divisors (see below), whose sum is σ = 3922587648. Its totient is φ = 742500000.

The previous prime is 2001233497. The next prime is 2001233543. The reversal of 2001233542 is 2453321002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001233543) 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, 887917 + ... + 890167.

It is an arithmetic number, because the mean of its divisors is an integer number (61290432).

Almost surely, 2^2001233542 is an apocalyptic number.

2001233542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001233542 is a deficient number, since it is larger than the sum of its proper divisors (1921354106).

2001233542 is a wasteful number, since it uses less digits than its factorization.

2001233542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2001233542 is about 44735.1488429400. The cubic root of 2001233542 is about 1260.1800242482.

Adding to 2001233542 its reverse (2453321002), we get a palindrome (4454554544).

The spelling of 2001233542 in words is "two billion, one million, two hundred thirty-three thousand, five hundred forty-two".