42551069 has 4 divisors (see below), whose sum is σ = 46419360. Its totient is φ = 38682780.

The previous prime is 42551057. The next prime is 42551107. The reversal of 42551069 is 96015524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42551069 - 2⁴ = 42551053 is a prime.

It is a super-2 number, since 2×42551069² = 3621186946085522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42551039) 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, 1934129 + ... + 1934150.

It is an arithmetic number, because the mean of its divisors is an integer number (11604840).

Almost surely, 2^42551069 is an apocalyptic number.

It is an amenable number.

42551069 is a deficient number, since it is larger than the sum of its proper divisors (3868291).

42551069 is a wasteful number, since it uses less digits than its factorization.

42551069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3868290.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 42551069 is about 6523.1180427768. The cubic root of 42551069 is about 349.1163258942.

The spelling of 42551069 in words is "forty-two million, five hundred fifty-one thousand, sixty-nine".