42930031 has 8 divisors (see below), whose sum is σ = 43743728. Its totient is φ = 42120000.

The previous prime is 42930001. The next prime is 42930047. The reversal of 42930031 is 13003924.

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

It is a 6-Lehmer number, since φ(42930031) divides (42930031-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 42930031 - 2⁷ = 42929903 is a prime.

It is a super-2 number, since 2×42930031² = 3685975123321922, 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 = 42929984 and 42930011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42930001) 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, 36076 + ... + 37246.

It is an arithmetic number, because the mean of its divisors is an integer number (5467966).

Almost surely, 2^42930031 is an apocalyptic number.

42930031 is a deficient number, since it is larger than the sum of its proper divisors (813697).

42930031 is a wasteful number, since it uses less digits than its factorization.

42930031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 42930031 is about 6552.1012660062. The cubic root of 42930031 is about 350.1496801967.

Adding to 42930031 its reverse (13003924), we get a palindrome (55933955).

The spelling of 42930031 in words is "forty-two million, nine hundred thirty thousand, thirty-one".