155022013 has 8 divisors (see below), whose sum is σ = 156288888. Its totient is φ = 153759744.

The previous prime is 155022011. The next prime is 155022017. The reversal of 155022013 is 310220551.

It can be written as a sum of positive squares in 4 ways, for example, as 72539289 + 82482724 = 8517^2 + 9082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155022013 - 2¹ = 155022011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155022011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99045 + ... + 100597.

It is an arithmetic number, because the mean of its divisors is an integer number (19536111).

Almost surely, 2^155022013 is an apocalyptic number.

It is an amenable number.

155022013 is a deficient number, since it is larger than the sum of its proper divisors (1266875).

155022013 is a wasteful number, since it uses less digits than its factorization.

155022013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155022013 is about 12450.7836299568. The cubic root of 155022013 is about 537.1939637337.

Adding to 155022013 its reverse (310220551), we get a palindrome (465242564).

The spelling of 155022013 in words is "one hundred fifty-five million, twenty-two thousand, thirteen".