70216531 has 8 divisors (see below), whose sum is σ = 87542784. Its totient is φ = 54714120.

The previous prime is 70216501. The next prime is 70216541. The reversal of 70216531 is 13561207.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70216531 - 2⁷ = 70216403 is a prime.

It is a super-2 number, since 2×70216531² = 9860722451347922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70216496 and 70216505.

It is not an unprimeable number, because it can be changed into a prime (70216501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455875 + ... + 456028.

It is an arithmetic number, because the mean of its divisors is an integer number (10942848).

Almost surely, 2^70216531 is an apocalyptic number.

70216531 is a deficient number, since it is larger than the sum of its proper divisors (17326253).

70216531 is a wasteful number, since it uses less digits than its factorization.

70216531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911921.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 70216531 is about 8379.5304761066. The cubic root of 70216531 is about 412.5530382980.

Adding to 70216531 its reverse (13561207), we get a palindrome (83777738).

The spelling of 70216531 in words is "seventy million, two hundred sixteen thousand, five hundred thirty-one".