155237413 has 2 divisors, whose sum is σ = 155237414. Its totient is φ = 155237412.

The previous prime is 155237399. The next prime is 155237417. The reversal of 155237413 is 314732551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142038724 + 13198689 = 11918^2 + 3633^2 .

It is a cyclic number.

It is not a de Polignac number, because 155237413 - 2²¹ = 153140261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155237417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77618706 + 77618707.

It is an arithmetic number, because the mean of its divisors is an integer number (77618707).

Almost surely, 2^155237413 is an apocalyptic number.

It is an amenable number.

155237413 is a deficient number, since it is larger than the sum of its proper divisors (1).

155237413 is an equidigital number, since it uses as much as digits as its factorization.

155237413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 155237413 is about 12459.4306852280. The cubic root of 155237413 is about 537.4426553569.

Adding to 155237413 its reverse (314732551), we get a palindrome (469969964).

The spelling of 155237413 in words is "one hundred fifty-five million, two hundred thirty-seven thousand, four hundred thirteen".