155412443 has 2 divisors, whose sum is σ = 155412444. Its totient is φ = 155412442.

The previous prime is 155412407. The next prime is 155412451. The reversal of 155412443 is 344214551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155412443 - 2²² = 151218139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155412473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77706221 + 77706222.

It is an arithmetic number, because the mean of its divisors is an integer number (77706222).

Almost surely, 2^155412443 is an apocalyptic number.

155412443 is a deficient number, since it is larger than the sum of its proper divisors (1).

155412443 is an equidigital number, since it uses as much as digits as its factorization.

155412443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 29.

The square root of 155412443 is about 12466.4527031550. The cubic root of 155412443 is about 537.6445681437.

Adding to 155412443 its reverse (344214551), we get a palindrome (499626994).

The spelling of 155412443 in words is "one hundred fifty-five million, four hundred twelve thousand, four hundred forty-three".