2002196731 has 4 divisors (see below), whose sum is σ = 2015456464. Its totient is φ = 1988937000.

The previous prime is 2002196723. The next prime is 2002196761. The reversal of 2002196731 is 1376912002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1376912002 = 2 ⋅688456001.

It is a cyclic number.

It is not a de Polignac number, because 2002196731 - 2³ = 2002196723 is a prime.

It is a super-2 number, since 2×2002196731² = 8017583499254172722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002196693 and 2002196702.

It is not an unprimeable number, because it can be changed into a prime (2002196701) 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, 6629640 + ... + 6629941.

It is an arithmetic number, because the mean of its divisors is an integer number (503864116).

Almost surely, 2^2002196731 is an apocalyptic number.

2002196731 is a deficient number, since it is larger than the sum of its proper divisors (13259733).

2002196731 is a wasteful number, since it uses less digits than its factorization.

2002196731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13259732.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2002196731 is about 44745.9130088995. The cubic root of 2002196731 is about 1260.3821657161.

The spelling of 2002196731 in words is "two billion, two million, one hundred ninety-six thousand, seven hundred thirty-one".