2072117951 has 4 divisors (see below), whose sum is σ = 2090455392. Its totient is φ = 2053780512.

The previous prime is 2072117933. The next prime is 2072117963. The reversal of 2072117951 is 1597112702.

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-2072117951 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 (2072117651) 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, 9168551 + ... + 9168776.

It is an arithmetic number, because the mean of its divisors is an integer number (522613848).

Almost surely, 2^2072117951 is an apocalyptic number.

2072117951 is a deficient number, since it is larger than the sum of its proper divisors (18337441).

2072117951 is a wasteful number, since it uses less digits than its factorization.

2072117951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18337440.

The product of its (nonzero) digits is 8820, while the sum is 35.

The square root of 2072117951 is about 45520.5223058787. The cubic root of 2072117951 is about 1274.8864081296.

The spelling of 2072117951 in words is "two billion, seventy-two million, one hundred seventeen thousand, nine hundred fifty-one".