2154859471 has 8 divisors (see below), whose sum is σ = 2238991920. Its totient is φ = 2071382208.

The previous prime is 2154859457. The next prime is 2154859493. The reversal of 2154859471 is 1749584512.

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

It is a cyclic number.

It is not a de Polignac number, because 2154859471 - 2¹⁵ = 2154826703 is a prime.

It is a super-3 number, since 3×2154859471³ (a number of 29 digits) contains 333 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 (2154859271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157086 + ... + 170251.

It is an arithmetic number, because the mean of its divisors is an integer number (279873990).

Almost surely, 2^2154859471 is an apocalyptic number.

2154859471 is a deficient number, since it is larger than the sum of its proper divisors (84132449).

2154859471 is a wasteful number, since it uses less digits than its factorization.

2154859471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327593.

The product of its digits is 403200, while the sum is 46.

The square root of 2154859471 is about 46420.4639248683. The cubic root of 2154859471 is about 1291.6345426035.

The spelling of 2154859471 in words is "two billion, one hundred fifty-four million, eight hundred fifty-nine thousand, four hundred seventy-one".