43155420 has 96 divisors (see below), whose sum is σ = 150667776. Its totient is φ = 8966400.

The previous prime is 43155419. The next prime is 43155421. The reversal of 43155420 is 2455134.

It is an interprime number because it is at equal distance from previous prime (43155419) and next prime (43155421).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43155421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51 + ... + 9290.

It is an arithmetic number, because the mean of its divisors is an integer number (1569456).

Almost surely, 2^43155420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43155420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75333888).

43155420 is an abundant number, since it is smaller than the sum of its proper divisors (107512356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43155420 is a wasteful number, since it uses less digits than its factorization.

43155420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371 (or 9369 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 43155420 is about 6569.2784991961. The cubic root of 43155420 is about 350.7613900898.

The spelling of 43155420 in words is "forty-three million, one hundred fifty-five thousand, four hundred twenty".