70522021 has 8 divisors (see below), whose sum is σ = 72277920. Its totient is φ = 68771472.

The previous prime is 70522013. The next prime is 70522027. The reversal of 70522021 is 12022507.

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 70522021 - 2³ = 70522013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70522021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70522027) 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, 42750 + ... + 44368.

It is an arithmetic number, because the mean of its divisors is an integer number (9034740).

Almost surely, 2^70522021 is an apocalyptic number.

It is an amenable number.

70522021 is a deficient number, since it is larger than the sum of its proper divisors (1755899).

70522021 is a wasteful number, since it uses less digits than its factorization.

70522021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 70522021 is about 8397.7390409562. The cubic root of 70522021 is about 413.1504688124.

Adding to 70522021 its reverse (12022507), we get a palindrome (82544528).

The spelling of 70522021 in words is "seventy million, five hundred twenty-two thousand, twenty-one".