42951919 has 8 divisors (see below), whose sum is σ = 43675632. Its totient is φ = 42233280.

The previous prime is 42951917. The next prime is 42951949. The reversal of 42951919 is 91915924.

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 42951919 - 2¹ = 42951917 is a prime.

It is a super-2 number, since 2×42951919² = 3689734691565122, 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 (42951917) 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, 18229 + ... + 20449.

It is an arithmetic number, because the mean of its divisors is an integer number (5459454).

Almost surely, 2^42951919 is an apocalyptic number.

42951919 is a deficient number, since it is larger than the sum of its proper divisors (723713).

42951919 is a wasteful number, since it uses less digits than its factorization.

42951919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its digits is 29160, while the sum is 40.

The square root of 42951919 is about 6553.7713570127. The cubic root of 42951919 is about 350.2091783605.

The spelling of 42951919 in words is "forty-two million, nine hundred fifty-one thousand, nine hundred nineteen".