2001342551 has 4 divisors (see below), whose sum is σ = 2155291992. Its totient is φ = 1847393112.

The previous prime is 2001342467. The next prime is 2001342583. The reversal of 2001342551 is 1552431002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001342551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001344551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76974701 + ... + 76974726.

It is an arithmetic number, because the mean of its divisors is an integer number (538822998).

Almost surely, 2^2001342551 is an apocalyptic number.

2001342551 is a deficient number, since it is larger than the sum of its proper divisors (153949441).

2001342551 is a wasteful number, since it uses less digits than its factorization.

2001342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153949440.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2001342551 is about 44736.3672083463. The cubic root of 2001342551 is about 1260.2029048811.

Adding to 2001342551 its reverse (1552431002), we get a palindrome (3553773553).

The spelling of 2001342551 in words is "two billion, one million, three hundred forty-two thousand, five hundred fifty-one".