2155413242 has 4 divisors (see below), whose sum is σ = 3233119866. Its totient is φ = 1077706620.

The previous prime is 2155413241. The next prime is 2155413259. The reversal of 2155413242 is 2423145512.

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., 1147922161 + 1007491081 = 33881^2 + 31741^2 .

It is not an unprimeable number, because it can be changed into a prime (2155413241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538853309 + ... + 538853312.

Almost surely, 2^2155413242 is an apocalyptic number.

2155413242 is a deficient number, since it is larger than the sum of its proper divisors (1077706624).

2155413242 is a wasteful number, since it uses less digits than its factorization.

2155413242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077706623.

The product of its digits is 9600, while the sum is 29.

The square root of 2155413242 is about 46426.4282709751. The cubic root of 2155413242 is about 1291.7451775814.

Adding to 2155413242 its reverse (2423145512), we get a palindrome (4578558754).

The spelling of 2155413242 in words is "two billion, one hundred fifty-five million, four hundred thirteen thousand, two hundred forty-two".