2154356434 has 4 divisors (see below), whose sum is σ = 3231534654. Its totient is φ = 1077178216.

The previous prime is 2154356417. The next prime is 2154356447. The reversal of 2154356434 is 4346534512.

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

It can be written as a sum of positive squares in only one way, i.e., 1878962409 + 275394025 = 43347^2 + 16595^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2154356393 and 2154356402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538589107 + ... + 538589110.

Almost surely, 2^2154356434 is an apocalyptic number.

2154356434 is a deficient number, since it is larger than the sum of its proper divisors (1077178220).

2154356434 is a wasteful number, since it uses less digits than its factorization.

2154356434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077178219.

The product of its digits is 172800, while the sum is 37.

The square root of 2154356434 is about 46415.0453409237. The cubic root of 2154356434 is about 1291.5340270727.

It can be divided in two parts, 21543 and 56434, that added together give a palindrome (77977).

The spelling of 2154356434 in words is "two billion, one hundred fifty-four million, three hundred fifty-six thousand, four hundred thirty-four".