2155352481 has 6 divisors (see below), whose sum is σ = 3113286930. Its totient is φ = 1436901648.

The previous prime is 2155352473. The next prime is 2155352489. The reversal of 2155352481 is 1842535512.

2155352481 is a `hidden beast` number, since 2 + 1 + 5 + 53 + 524 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (2155352473) and next prime (2155352489).

It can be written as a sum of positive squares in only one way, i.e., 1187147025 + 968205456 = 34455^2 + 31116^2 .

It is not a de Polignac number, because 2155352481 - 2³ = 2155352473 is a prime.

It is a super-2 number, since 2×2155352481² = 9291088634705710722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2155352489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119741796 + ... + 119741813.

It is an arithmetic number, because the mean of its divisors is an integer number (518881155).

Almost surely, 2^2155352481 is an apocalyptic number.

It is an amenable number.

2155352481 is a deficient number, since it is larger than the sum of its proper divisors (957934449).

2155352481 is a wasteful number, since it uses less digits than its factorization.

2155352481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239483615 (or 239483612 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 2155352481 is about 46425.7738869262. The cubic root of 2155352481 is about 1291.7330393883.

Adding to 2155352481 its reverse (1842535512), we get a palindrome (3997887993).

The spelling of 2155352481 in words is "two billion, one hundred fifty-five million, three hundred fifty-two thousand, four hundred eighty-one".