2158469621 has 16 divisors (see below), whose sum is σ = 2727950208. Its totient is φ = 1658880000.

The previous prime is 2158469611. The next prime is 2158469657. The reversal of 2158469621 is 1269648512.

It is a cyclic number.

It is not a de Polignac number, because 2158469621 - 2³⁰ = 1084727797 is a prime.

It is a super-2 number, since 2×2158469621² = 9317982209559767282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158469611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186380 + ... + 197621.

It is an arithmetic number, because the mean of its divisors is an integer number (170496888).

Almost surely, 2^2158469621 is an apocalyptic number.

It is an amenable number.

2158469621 is a deficient number, since it is larger than the sum of its proper divisors (569480587).

2158469621 is a wasteful number, since it uses less digits than its factorization.

2158469621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384092.

The product of its digits is 207360, while the sum is 44.

The square root of 2158469621 is about 46459.3329805756. The cubic root of 2158469621 is about 1292.3554547054.

The spelling of 2158469621 in words is "two billion, one hundred fifty-eight million, four hundred sixty-nine thousand, six hundred twenty-one".