2156533534 has 4 divisors (see below), whose sum is σ = 3234800304. Its totient is φ = 1078266766.

The previous prime is 2156533531. The next prime is 2156533541. The reversal of 2156533534 is 4353356512.

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

It is a junction number, because it is equal to n+sod(n) for n = 2156533493 and 2156533502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156533531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539133382 + ... + 539133385.

It is an arithmetic number, because the mean of its divisors is an integer number (808700076).

Almost surely, 2^2156533534 is an apocalyptic number.

2156533534 is a deficient number, since it is larger than the sum of its proper divisors (1078266770).

2156533534 is a wasteful number, since it uses less digits than its factorization.

2156533534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078266769.

The product of its digits is 162000, while the sum is 37.

The square root of 2156533534 is about 46438.4919436452. The cubic root of 2156533534 is about 1291.9689368608.

The spelling of 2156533534 in words is "two billion, one hundred fifty-six million, five hundred thirty-three thousand, five hundred thirty-four".