42189551 has 8 divisors (see below), whose sum is σ = 42667008. Its totient is φ = 41715000.

The previous prime is 42189517. The next prime is 42189559. The reversal of 42189551 is 15598124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42189551 - 2⁶ = 42189487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42189559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40406 + ... + 41436.

It is an arithmetic number, because the mean of its divisors is an integer number (5333376).

Almost surely, 2^42189551 is an apocalyptic number.

42189551 is a deficient number, since it is larger than the sum of its proper divisors (477457).

42189551 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (42189550) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1453).

42189551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453.

The product of its digits is 14400, while the sum is 35.

The square root of 42189551 is about 6495.3484125180. The cubic root of 42189551 is about 348.1248038510.

The spelling of 42189551 in words is "forty-two million, one hundred eighty-nine thousand, five hundred fifty-one".