42167551 has 4 divisors (see below), whose sum is σ = 42194152. Its totient is φ = 42140952.

The previous prime is 42167473. The next prime is 42167561. The reversal of 42167551 is 15576124.

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 42167551 - 2⁹ = 42167039 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 (42167561) 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, 10761 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (10548538).

Almost surely, 2^42167551 is an apocalyptic number.

42167551 is a deficient number, since it is larger than the sum of its proper divisors (26601).

42167551 is a wasteful number, since it uses less digits than its factorization.

42167551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26600.

The product of its digits is 8400, while the sum is 31.

The square root of 42167551 is about 6493.6546720626. The cubic root of 42167551 is about 348.0642827257.

The spelling of 42167551 in words is "forty-two million, one hundred sixty-seven thousand, five hundred fifty-one".