2156535 has 24 divisors (see below), whose sum is σ = 3959280. Its totient is φ = 1082112.

The previous prime is 2156521. The next prime is 2156537. The reversal of 2156535 is 5356512.

2156535 is a `hidden beast` number, since 2 + 1 + 5 + 653 + 5 = 666.

It is not a de Polignac number, because 2156535 - 2⁸ = 2156279 is a prime.

2156535 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2156499 and 2156508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 645 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (164970).

2^2156535 is an apocalyptic number.

2156535 is a deficient number, since it is larger than the sum of its proper divisors (1802745).

2156535 is a wasteful number, since it uses less digits than its factorization.

2156535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2844 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 2156535 is about 1468.5145555969. The cubic root of 2156535 is about 129.1969229619.

The spelling of 2156535 in words is "two million, one hundred fifty-six thousand, five hundred thirty-five".