70215961 has 8 divisors (see below), whose sum is σ = 72578304. Its totient is φ = 67859760.

The previous prime is 70215953. The next prime is 70215991. The reversal of 70215961 is 16951207.

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 70215961 - 2³ = 70215953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70215991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39651 + ... + 41383.

It is an arithmetic number, because the mean of its divisors is an integer number (9072288).

Almost surely, 2^70215961 is an apocalyptic number.

It is an amenable number.

70215961 is a deficient number, since it is larger than the sum of its proper divisors (2362343).

70215961 is a wasteful number, since it uses less digits than its factorization.

70215961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 70215961 is about 8379.4964645854. The cubic root of 70215961 is about 412.5519219613.

The spelling of 70215961 in words is "seventy million, two hundred fifteen thousand, nine hundred sixty-one".