32155643 has 4 divisors (see below), whose sum is σ = 34629168. Its totient is φ = 29682120.

The previous prime is 32155639. The next prime is 32155699. The reversal of 32155643 is 34655123.

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

It is not a de Polignac number, because 32155643 - 2² = 32155639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32151643) 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, 1236743 + ... + 1236768.

It is an arithmetic number, because the mean of its divisors is an integer number (8657292).

Almost surely, 2^32155643 is an apocalyptic number.

32155643 is a deficient number, since it is larger than the sum of its proper divisors (2473525).

32155643 is a wasteful number, since it uses less digits than its factorization.

32155643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473524.

The product of its digits is 10800, while the sum is 29.

The square root of 32155643 is about 5670.5945896352. The cubic root of 32155643 is about 317.9941028402.

It can be divided in two parts, 32155 and 643, that multiplied together give a triangular number (20675665 = T₆₄₃₀).

The spelling of 32155643 in words is "thirty-two million, one hundred fifty-five thousand, six hundred forty-three".