42122031 has 32 divisors (see below), whose sum is σ = 68006400. Its totient is φ = 22654080.

The previous prime is 42122027. The next prime is 42122051. The reversal of 42122031 is 13022124.

It is not a de Polignac number, because 42122031 - 2² = 42122027 is a prime.

It is a super-2 number, since 2×42122031² = 3548530991129922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42122051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91141 + ... + 91601.

It is an arithmetic number, because the mean of its divisors is an integer number (2125200).

Almost surely, 2^42122031 is an apocalyptic number.

42122031 is a deficient number, since it is larger than the sum of its proper divisors (25884369).

42122031 is a wasteful number, since it uses less digits than its factorization.

42122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 42122031 is about 6490.1487656293. The cubic root of 42122031 is about 347.9389921459.

Adding to 42122031 its reverse (13022124), we get a palindrome (55144155).

The spelling of 42122031 in words is "forty-two million, one hundred twenty-two thousand, thirty-one".