3155240381 has 2 divisors, whose sum is σ = 3155240382. Its totient is φ = 3155240380.

The previous prime is 3155240351. The next prime is 3155240393. The reversal of 3155240381 is 1830425513.

3155240381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2949576100 + 205664281 = 54310^2 + 14341^2 .

It is a cyclic number.

It is not a de Polignac number, because 3155240381 - 2²² = 3151046077 is a prime.

It is a super-2 number, since 2×3155240381² = 19911083723786050322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3155240351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1577620190 + 1577620191.

It is an arithmetic number, because the mean of its divisors is an integer number (1577620191).

Almost surely, 2^3155240381 is an apocalyptic number.

It is an amenable number.

3155240381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3155240381 is an equidigital number, since it uses as much as digits as its factorization.

3155240381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 3155240381 is about 56171.5264257613. The cubic root of 3155240381 is about 1466.7096537389.

Adding to 3155240381 its reverse (1830425513), we get a palindrome (4985665894).

The spelling of 3155240381 in words is "three billion, one hundred fifty-five million, two hundred forty thousand, three hundred eighty-one".