155402113 has 4 divisors (see below), whose sum is σ = 155825920. Its totient is φ = 154978308.

The previous prime is 155402111. The next prime is 155402131. The reversal of 155402113 is 311204551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311204551 = 7 ⋅44457793.

It is a cyclic number.

It is not a de Polignac number, because 155402113 - 2¹ = 155402111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155402111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211353 + ... + 212086.

It is an arithmetic number, because the mean of its divisors is an integer number (38956480).

Almost surely, 2^155402113 is an apocalyptic number.

It is an amenable number.

155402113 is a deficient number, since it is larger than the sum of its proper divisors (423807).

155402113 is an equidigital number, since it uses as much as digits as its factorization.

155402113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423806.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 155402113 is about 12466.0383843465. The cubic root of 155402113 is about 537.6326557740.

Adding to 155402113 its reverse (311204551), we get a palindrome (466606664).

The spelling of 155402113 in words is "one hundred fifty-five million, four hundred two thousand, one hundred thirteen".