2123601551 has 8 divisors (see below), whose sum is σ = 2169014400. Its totient is φ = 2078619480.

The previous prime is 2123601541. The next prime is 2123601577. The reversal of 2123601551 is 1551063212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123601551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123601551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123601511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97721 + ... + 117458.

It is an arithmetic number, because the mean of its divisors is an integer number (271126800).

Almost surely, 2^2123601551 is an apocalyptic number.

2123601551 is a deficient number, since it is larger than the sum of its proper divisors (45412849).

2123601551 is a wasteful number, since it uses less digits than its factorization.

2123601551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215389.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2123601551 is about 46082.5514810107. The cubic root of 2123601551 is about 1285.3587094271.

Adding to 2123601551 its reverse (1551063212), we get a palindrome (3674664763).

The spelling of 2123601551 in words is "two billion, one hundred twenty-three million, six hundred one thousand, five hundred fifty-one".