42990331 has 8 divisors (see below), whose sum is σ = 47915280. Its totient is φ = 38331648.

The previous prime is 42990329. The next prime is 42990377. The reversal of 42990331 is 13309924.

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 42990331 - 2¹ = 42990329 is a prime.

It is a super-2 number, since 2×42990331² = 3696337118979122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42990293 and 42990302.

It is not an unprimeable number, because it can be changed into a prime (42990301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66226 + ... + 66871.

It is an arithmetic number, because the mean of its divisors is an integer number (5989410).

Almost surely, 2^42990331 is an apocalyptic number.

42990331 is a deficient number, since it is larger than the sum of its proper divisors (4924949).

42990331 is a wasteful number, since it uses less digits than its factorization.

42990331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133133.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 42990331 is about 6556.7012285142. The cubic root of 42990331 is about 350.3135448796.

The spelling of 42990331 in words is "forty-two million, nine hundred ninety thousand, three hundred thirty-one".