70031 has 4 divisors (see below), whose sum is σ = 75432. Its totient is φ = 64632.

The previous prime is 70019. The next prime is 70039. The reversal of 70031 is 13007.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70031 is a prime.

It is a super-2 number, since 2×70031² = 9808681922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 69994 and 70021.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 70031.

It is not an unprimeable number, because it can be changed into a prime (70039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (18858).

2⁷⁰⁰³¹ is an apocalyptic number.

70031 is a deficient number, since it is larger than the sum of its proper divisors (5401).

70031 is a wasteful number, since it uses less digits than its factorization.

70031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400.

The product of its (nonzero) digits is 21, while the sum is 11.

The square root of 70031 is about 264.6337091151. The cubic root of 70031 is about 41.2189359023.

Adding to 70031 its reverse (13007), we get a palindrome (83038).

The spelling of 70031 in words is "seventy thousand, thirty-one".