2531661851 has 8 divisors (see below), whose sum is σ = 2591297280. Its totient is φ = 2472061032.

The previous prime is 2531661829. The next prime is 2531661877. The reversal of 2531661851 is 1581661352.

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

It is a cyclic number.

It is not a de Polignac number, because 2531661851 - 2¹⁰ = 2531660827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531661151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194906 + ... + 207488.

It is an arithmetic number, because the mean of its divisors is an integer number (323912160).

Almost surely, 2^2531661851 is an apocalyptic number.

2531661851 is a deficient number, since it is larger than the sum of its proper divisors (59635429).

2531661851 is a wasteful number, since it uses less digits than its factorization.

2531661851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17305.

The product of its digits is 43200, while the sum is 38.

The square root of 2531661851 is about 50315.6223354139. The cubic root of 2531661851 is about 1362.9143549795.

The spelling of 2531661851 in words is "two billion, five hundred thirty-one million, six hundred sixty-one thousand, eight hundred fifty-one".