2050615991 has 8 divisors (see below), whose sum is σ = 2148962400. Its totient is φ = 1953035392.

The previous prime is 2050615909. The next prime is 2050615999. The reversal of 2050615991 is 1995160502.

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 2050615991 - 2³⁰ = 976874167 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 (2050615999) 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, 185966 + ... + 196683.

It is an arithmetic number, because the mean of its divisors is an integer number (268620300).

Almost surely, 2^2050615991 is an apocalyptic number.

2050615991 is a deficient number, since it is larger than the sum of its proper divisors (98346409).

2050615991 is a wasteful number, since it uses less digits than its factorization.

2050615991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382905.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 2050615991 is about 45283.7276623734. The cubic root of 2050615991 is about 1270.4613181389.

The spelling of 2050615991 in words is "two billion, fifty million, six hundred fifteen thousand, nine hundred ninety-one".