70225561 has 4 divisors (see below), whose sum is σ = 80257792. Its totient is φ = 60193332.

The previous prime is 70225537. The next prime is 70225591. The reversal of 70225561 is 16552207.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16552207 = 7 ⋅2364601.

It is a cyclic number.

It is not a de Polignac number, because 70225561 - 2⁷ = 70225433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70225511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5016105 + ... + 5016118.

It is an arithmetic number, because the mean of its divisors is an integer number (20064448).

Almost surely, 2^70225561 is an apocalyptic number.

It is an amenable number.

70225561 is a deficient number, since it is larger than the sum of its proper divisors (10032231).

70225561 is a wasteful number, since it uses less digits than its factorization.

70225561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10032230.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 70225561 is about 8380.0692717901. The cubic root of 70225561 is about 412.5707226154.

Adding to 70225561 its reverse (16552207), we get a palindrome (86777768).

The spelling of 70225561 in words is "seventy million, two hundred twenty-five thousand, five hundred sixty-one".