42470031 has 16 divisors (see below), whose sum is σ = 58680320. Its totient is φ = 27293760.

The previous prime is 42470023. The next prime is 42470041. The reversal of 42470031 is 13007424.

It is not a de Polignac number, because 42470031 - 2³ = 42470023 is a prime.

It is a super-2 number, since 2×42470031² = 3607407066281922, 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 (42470011) 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, 28380 + ... + 29838.

It is an arithmetic number, because the mean of its divisors is an integer number (3667520).

Almost surely, 2^42470031 is an apocalyptic number.

42470031 is a deficient number, since it is larger than the sum of its proper divisors (16210289).

42470031 is a wasteful number, since it uses less digits than its factorization.

42470031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

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

The square root of 42470031 is about 6516.9034824831. The cubic root of 42470031 is about 348.8945557648.

Adding to 42470031 its reverse (13007424), we get a palindrome (55477455).

The spelling of 42470031 in words is "forty-two million, four hundred seventy thousand, thirty-one".