2158129982 has 4 divisors (see below), whose sum is σ = 3237194976. Its totient is φ = 1079064990.

The previous prime is 2158129937. The next prime is 2158130003. The reversal of 2158129982 is 2899218512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539532494 + ... + 539532497.

It is an arithmetic number, because the mean of its divisors is an integer number (809298744).

Almost surely, 2^2158129982 is an apocalyptic number.

2158129982 is a deficient number, since it is larger than the sum of its proper divisors (1079064994).

2158129982 is a wasteful number, since it uses less digits than its factorization.

2158129982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079064993.

The product of its digits is 207360, while the sum is 47.

The square root of 2158129982 is about 46455.6776078016. The cubic root of 2158129982 is about 1292.2876663467.

The spelling of 2158129982 in words is "two billion, one hundred fifty-eight million, one hundred twenty-nine thousand, nine hundred eighty-two".