70105531 has 8 divisors (see below), whose sum is σ = 72995328. Its totient is φ = 67272000.

The previous prime is 70105507. The next prime is 70105559. The reversal of 70105531 is 13550107.

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 70105531 - 2⁹ = 70105019 is a prime.

It is a super-2 number, since 2×70105531² = 9829570953583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70105561) 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, 11515 + ... + 16516.

It is an arithmetic number, because the mean of its divisors is an integer number (9124416).

Almost surely, 2^70105531 is an apocalyptic number.

70105531 is a deficient number, since it is larger than the sum of its proper divisors (2889797).

70105531 is a wasteful number, since it uses less digits than its factorization.

70105531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28133.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 70105531 is about 8372.9045736829. The cubic root of 70105531 is about 412.3355323525.

Adding to 70105531 its reverse (13550107), we get a palindrome (83655638).

The spelling of 70105531 in words is "seventy million, one hundred five thousand, five hundred thirty-one".