70315031 has 2 divisors, whose sum is σ = 70315032. Its totient is φ = 70315030.

The previous prime is 70315001. The next prime is 70315051. The reversal of 70315031 is 13051307.

It is a happy number.

It is an a-pointer prime, because the next prime (70315051) can be obtained adding 70315031 to its sum of digits (20).

It is a strong prime.

It is an emirp because it is prime and its reverse (13051307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70315031 - 2¹⁰ = 70314007 is a prime.

It is a super-2 number, since 2×70315031² = 9888407169061922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70314994 and 70315012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70315001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35157515 + 35157516.

It is an arithmetic number, because the mean of its divisors is an integer number (35157516).

Almost surely, 2^70315031 is an apocalyptic number.

70315031 is a deficient number, since it is larger than the sum of its proper divisors (1).

70315031 is an equidigital number, since it uses as much as digits as its factorization.

70315031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 70315031 is about 8385.4058339475. The cubic root of 70315031 is about 412.7458584541.

Adding to 70315031 its reverse (13051307), we get a palindrome (83366338).

The spelling of 70315031 in words is "seventy million, three hundred fifteen thousand, thirty-one".