42722031 has 16 divisors (see below), whose sum is σ = 62749440. Its totient is φ = 25638720.

The previous prime is 42722027. The next prime is 42722033. The reversal of 42722031 is 13022724.

42722031 = 349² + 350² + ... + 554².

It is not a de Polignac number, because 42722031 - 2² = 42722027 is a prime.

It is a super-2 number, since 2×42722031² = 3650343865529922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42721989 and 42722007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42722033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2886 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (3921840).

Almost surely, 2^42722031 is an apocalyptic number.

42722031 is a deficient number, since it is larger than the sum of its proper divisors (20027409).

42722031 is a wasteful number, since it uses less digits than its factorization.

42722031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 42722031 is about 6536.2092224775. The cubic root of 42722031 is about 349.5832618180.

Adding to 42722031 its reverse (13022724), we get a palindrome (55744755).

The spelling of 42722031 in words is "forty-two million, seven hundred twenty-two thousand, thirty-one".