2157434469 has 12 divisors (see below), whose sum is σ = 3116786400. Its totient is φ = 1438062504.

The previous prime is 2157434407. The next prime is 2157434501. The reversal of 2157434469 is 9644347512.

2157434469 is a `hidden beast` number, since 2 + 1 + 574 + 34 + 46 + 9 = 666.

It is not a de Polignac number, because 2157434469 - 2¹³ = 2157426277 is a prime.

It is a super-2 number, since 2×2157434469² = 9309046976058623922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157434969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57442 + ... + 87260.

It is an arithmetic number, because the mean of its divisors is an integer number (259732200).

Almost surely, 2^2157434469 is an apocalyptic number.

It is an amenable number.

2157434469 is a deficient number, since it is larger than the sum of its proper divisors (959351931).

2157434469 is a wasteful number, since it uses less digits than its factorization.

2157434469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37864 (or 37861 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 2157434469 is about 46448.1912349663. The cubic root of 2157434469 is about 1292.1488270969.

The spelling of 2157434469 in words is "two billion, one hundred fifty-seven million, four hundred thirty-four thousand, four hundred sixty-nine".