2159021953 has 4 divisors (see below), whose sum is σ = 2355296688. Its totient is φ = 1962747220.

The previous prime is 2159021933. The next prime is 2159022007. The reversal of 2159021953 is 3591209512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2159021953 is a prime.

It is a super-2 number, since 2×2159021953² = 9322751587071868418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159021903) 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, 98137351 + ... + 98137372.

It is an arithmetic number, because the mean of its divisors is an integer number (588824172).

Almost surely, 2^2159021953 is an apocalyptic number.

It is an amenable number.

2159021953 is a deficient number, since it is larger than the sum of its proper divisors (196274735).

2159021953 is a wasteful number, since it uses less digits than its factorization.

2159021953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196274734.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 2159021953 is about 46465.2768527209. The cubic root of 2159021953 is about 1292.4656791578.

The spelling of 2159021953 in words is "two billion, one hundred fifty-nine million, twenty-one thousand, nine hundred fifty-three".