155412643 has 4 divisors (see below), whose sum is σ = 155446768. Its totient is φ = 155378520.

The previous prime is 155412613. The next prime is 155412659. The reversal of 155412643 is 346214551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155412643 - 2⁵ = 155412611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155412613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8943 + ... + 19768.

It is an arithmetic number, because the mean of its divisors is an integer number (38861692).

Almost surely, 2^155412643 is an apocalyptic number.

155412643 is a deficient number, since it is larger than the sum of its proper divisors (34125).

155412643 is an equidigital number, since it uses as much as digits as its factorization.

155412643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34124.

The product of its digits is 14400, while the sum is 31.

The square root of 155412643 is about 12466.4607246804. The cubic root of 155412643 is about 537.6447987749.

The spelling of 155412643 in words is "one hundred fifty-five million, four hundred twelve thousand, six hundred forty-three".