155232643 has 4 divisors (see below), whose sum is σ = 156976920. Its totient is φ = 153488368.

The previous prime is 155232611. The next prime is 155232653. The reversal of 155232643 is 346232551.

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 155232643 - 2⁵ = 155232611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155232653) 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, 872005 + ... + 872182.

It is an arithmetic number, because the mean of its divisors is an integer number (39244230).

Almost surely, 2^155232643 is an apocalyptic number.

155232643 is a deficient number, since it is larger than the sum of its proper divisors (1744277).

155232643 is an equidigital number, since it uses as much as digits as its factorization.

155232643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744276.

The product of its digits is 21600, while the sum is 31.

The square root of 155232643 is about 12459.2392624911. The cubic root of 155232643 is about 537.4371506106.

The spelling of 155232643 in words is "one hundred fifty-five million, two hundred thirty-two thousand, six hundred forty-three".