70522521 has 4 divisors (see below), whose sum is σ = 94030032. Its totient is φ = 47015012.

The previous prime is 70522493. The next prime is 70522549. The reversal of 70522521 is 12522507.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (70522493) and next prime (70522549).

It is a cyclic number.

It is not a de Polignac number, because 70522521 - 2¹³ = 70514329 is a prime.

It is a super-4 number, since 4×70522521⁴ (a number of 32 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70522491 and 70522500.

It is not an unprimeable number, because it can be changed into a prime (70522591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11753751 + ... + 11753756.

It is an arithmetic number, because the mean of its divisors is an integer number (23507508).

Almost surely, 2^70522521 is an apocalyptic number.

It is an amenable number.

70522521 is a deficient number, since it is larger than the sum of its proper divisors (23507511).

70522521 is a wasteful number, since it uses less digits than its factorization.

70522521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23507510.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 70522521 is about 8397.7688108211. The cubic root of 70522521 is about 413.1514452201.

The spelling of 70522521 in words is "seventy million, five hundred twenty-two thousand, five hundred twenty-one".