155532313 has 2 divisors, whose sum is σ = 155532314. Its totient is φ = 155532312.

The previous prime is 155532287. The next prime is 155532329. The reversal of 155532313 is 313235551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92679129 + 62853184 = 9627^2 + 7928^2 .

It is a cyclic number.

It is not a de Polignac number, because 155532313 - 2⁵ = 155532281 is a prime.

It is not a weakly prime, because it can be changed into another prime (155532343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77766156 + 77766157.

It is an arithmetic number, because the mean of its divisors is an integer number (77766157).

Almost surely, 2^155532313 is an apocalyptic number.

It is an amenable number.

155532313 is a deficient number, since it is larger than the sum of its proper divisors (1).

155532313 is an equidigital number, since it uses as much as digits as its factorization.

155532313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6750, while the sum is 28.

The square root of 155532313 is about 12471.2594792988. The cubic root of 155532313 is about 537.7827614800.

Adding to 155532313 its reverse (313235551), we get a palindrome (468767864).

The spelling of 155532313 in words is "one hundred fifty-five million, five hundred thirty-two thousand, three hundred thirteen".