70321331 has 2 divisors, whose sum is σ = 70321332. Its totient is φ = 70321330.

The previous prime is 70321319. The next prime is 70321343. The reversal of 70321331 is 13312307.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (70321319) and next prime (70321343).

It is an emirp because it is prime and its reverse (13312307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70321331 - 2⁶ = 70321267 is a prime.

It is a super-2 number, since 2×70321331² = 9890179187223122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70311331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35160665 + 35160666.

It is an arithmetic number, because the mean of its divisors is an integer number (35160666).

Almost surely, 2^70321331 is an apocalyptic number.

70321331 is a deficient number, since it is larger than the sum of its proper divisors (1).

70321331 is an equidigital number, since it uses as much as digits as its factorization.

70321331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 70321331 is about 8385.7814781927. The cubic root of 70321331 is about 412.7581849852.

Adding to 70321331 its reverse (13312307), we get a palindrome (83633638).

The spelling of 70321331 in words is "seventy million, three hundred twenty-one thousand, three hundred thirty-one".