2061565251 has 8 divisors (see below), whose sum is σ = 2749953360. Its totient is φ = 1373776992.

The previous prime is 2061565243. The next prime is 2061565271. The reversal of 2061565251 is 1525651602.

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

It is not a de Polignac number, because 2061565251 - 2³ = 2061565243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2061565241) 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, 141880 + ... + 155733.

It is an arithmetic number, because the mean of its divisors is an integer number (343744170).

Almost surely, 2^2061565251 is an apocalyptic number.

2061565251 is a deficient number, since it is larger than the sum of its proper divisors (688388109).

2061565251 is a wasteful number, since it uses less digits than its factorization.

2061565251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299925.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 2061565251 is about 45404.4628973849. The cubic root of 2061565251 is about 1272.7185140215.

The spelling of 2061565251 in words is "two billion, sixty-one million, five hundred sixty-five thousand, two hundred fifty-one".