2158697294 has 8 divisors (see below), whose sum is σ = 3487126440. Its totient is φ = 996321816.

The previous prime is 2158697239. The next prime is 2158697297. The reversal of 2158697294 is 4927968512.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158697297) 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, 41513384 + ... + 41513435.

It is an arithmetic number, because the mean of its divisors is an integer number (435890805).

Almost surely, 2^2158697294 is an apocalyptic number.

2158697294 is a deficient number, since it is larger than the sum of its proper divisors (1328429146).

2158697294 is a wasteful number, since it uses less digits than its factorization.

2158697294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83026834.

The product of its digits is 2177280, while the sum is 53.

The square root of 2158697294 is about 46461.7831556216. The cubic root of 2158697294 is about 1292.4008918515.

The spelling of 2158697294 in words is "two billion, one hundred fifty-eight million, six hundred ninety-seven thousand, two hundred ninety-four".