2154356431 has 4 divisors (see below), whose sum is σ = 2155534864. Its totient is φ = 2153178000.

The previous prime is 2154356417. The next prime is 2154356447. The reversal of 2154356431 is 1346534512.

2154356431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154356431 - 2⁹ = 2154355919 is a prime.

It is a super-2 number, since 2×2154356431² = 9282503263582115522, 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 (2154356231) 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, 586470 + ... + 590131.

It is an arithmetic number, because the mean of its divisors is an integer number (538883716).

Almost surely, 2^2154356431 is an apocalyptic number.

2154356431 is a deficient number, since it is larger than the sum of its proper divisors (1178433).

2154356431 is a wasteful number, since it uses less digits than its factorization.

2154356431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178432.

The product of its digits is 43200, while the sum is 34.

The square root of 2154356431 is about 46415.0453086066. The cubic root of 2154356431 is about 1291.5340264732.

The spelling of 2154356431 in words is "two billion, one hundred fifty-four million, three hundred fifty-six thousand, four hundred thirty-one".