2158475436 has 54 divisors (see below), whose sum is σ = 5908151340. Its totient is φ = 664144416.

The previous prime is 2158475413. The next prime is 2158475467. The reversal of 2158475436 is 6345748512.

2158475436 is a `hidden beast` number, since 21 + 5 + 84 + 7 + 543 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2158475391 and 2158475400.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 171306 + ... + 183473.

It is an arithmetic number, because the mean of its divisors is an integer number (109410210).

Almost surely, 2^2158475436 is an apocalyptic number.

2158475436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2158475436 is an abundant number, since it is smaller than the sum of its proper divisors (3749675904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2158475436 is a wasteful number, since it uses less digits than its factorization.

2158475436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354815 (or 354797 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 2158475436 is about 46459.3955621465. The cubic root of 2158475436 is about 1292.3566152561.

It can be divided in two parts, 21584 and 75436, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 2158475436 in words is "two billion, one hundred fifty-eight million, four hundred seventy-five thousand, four hundred thirty-six".