2157969414 has 8 divisors (see below), whose sum is σ = 4315938840. Its totient is φ = 719323136.

The previous prime is 2157969391. The next prime is 2157969461. The reversal of 2157969414 is 4149697512.

It is a happy number.

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

2157969414 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179830779 + ... + 179830790.

It is an arithmetic number, because the mean of its divisors is an integer number (539492355).

Almost surely, 2^2157969414 is an apocalyptic number.

2157969414 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157969414 is a wasteful number, since it uses less digits than its factorization.

2157969414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359661574.

The product of its digits is 544320, while the sum is 48.

The square root of 2157969414 is about 46453.9493907676. The cubic root of 2157969414 is about 1292.2556161931.

The spelling of 2157969414 in words is "two billion, one hundred fifty-seven million, nine hundred sixty-nine thousand, four hundred fourteen".