2153651 has 4 divisors (see below), whose sum is σ = 2247312. Its totient is φ = 2059992.

The previous prime is 2153647. The next prime is 2153693. The reversal of 2153651 is 1563512.

2153651 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 2153651 - 2² = 2153647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 93637 = 2153651 / (2 + 1 + 5 + 3 + 6 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46796 + ... + 46841.

It is an arithmetic number, because the mean of its divisors is an integer number (561828).

2^2153651 is an apocalyptic number.

2153651 is a deficient number, since it is larger than the sum of its proper divisors (93661).

2153651 is an equidigital number, since it uses as much as digits as its factorization.

2153651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93660.

The product of its digits is 900, while the sum is 23.

The square root of 2153651 is about 1467.5322824388. The cubic root of 2153651 is about 129.1393042745.

The spelling of 2153651 in words is "two million, one hundred fifty-three thousand, six hundred fifty-one".