2131357994 has 8 divisors (see below), whose sum is σ = 3199789440. Its totient is φ = 1064761516.

The previous prime is 2131357993. The next prime is 2131357999. The reversal of 2131357994 is 4997531312.

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

It is not an unprimeable number, because it can be changed into a prime (2131357993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455834 + ... + 460485.

It is an arithmetic number, because the mean of its divisors is an integer number (399973680).

Almost surely, 2^2131357994 is an apocalyptic number.

2131357994 is a deficient number, since it is larger than the sum of its proper divisors (1068431446).

2131357994 is a wasteful number, since it uses less digits than its factorization.

2131357994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917484.

The product of its digits is 204120, while the sum is 44.

The square root of 2131357994 is about 46166.6329073282. The cubic root of 2131357994 is about 1286.9217298696.

The spelling of 2131357994 in words is "two billion, one hundred thirty-one million, three hundred fifty-seven thousand, nine hundred ninety-four".