2153722 has 4 divisors (see below), whose sum is σ = 3230586. Its totient is φ = 1076860.

The previous prime is 2153717. The next prime is 2153729. The reversal of 2153722 is 2273512.

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., 1852321 + 301401 = 1361^2 + 549^2 .

It is a d-powerful number, because it can be written as 2¹⁰ + 1 + 5⁹ + 3 + 7⁶ + 2¹⁴ + 2¹⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 2153693 and 2153702.

It is not an unprimeable number, because it can be changed into a prime (2153729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538429 + ... + 538432.

2^2153722 is an apocalyptic number.

2153722 is a deficient number, since it is larger than the sum of its proper divisors (1076864).

2153722 is a wasteful number, since it uses less digits than its factorization.

2153722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076863.

The product of its digits is 840, while the sum is 22.

The square root of 2153722 is about 1467.5564725080. The cubic root of 2153722 is about 129.1407233825.

The spelling of 2153722 in words is "two million, one hundred fifty-three thousand, seven hundred twenty-two".