2153331242 has 4 divisors (see below), whose sum is σ = 3229996866. Its totient is φ = 1076665620.

The previous prime is 2153331241. The next prime is 2153331263. The reversal of 2153331242 is 2421333512.

It is a happy number.

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., 1653316921 + 500014321 = 40661^2 + 22361^2 .

It is not an unprimeable number, because it can be changed into a prime (2153331241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538332809 + ... + 538332812.

Almost surely, 2^2153331242 is an apocalyptic number.

2153331242 is a deficient number, since it is larger than the sum of its proper divisors (1076665624).

2153331242 is a wasteful number, since it uses less digits than its factorization.

2153331242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076665623.

The product of its digits is 4320, while the sum is 26.

The square root of 2153331242 is about 46404.0002801483. Note that the first 3 decimals coincide. The cubic root of 2153331242 is about 1291.3291274539.

Subtracting from 2153331242 its sum of digits (26), we obtain a square (2153331216 = 46404²).

Adding to 2153331242 its reverse (2421333512), we get a palindrome (4574664754).

The spelling of 2153331242 in words is "two billion, one hundred fifty-three million, three hundred thirty-one thousand, two hundred forty-two".