22157007 has 4 divisors (see below), whose sum is σ = 29542680. Its totient is φ = 14771336.

The previous prime is 22156999. The next prime is 22157011. The reversal of 22157007 is 70075122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22157007 - 2³ = 22156999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22157207) 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 3 ways as a sum of consecutive naturals, for example, 3692832 + ... + 3692837.

It is an arithmetic number, because the mean of its divisors is an integer number (7385670).

Almost surely, 2^22157007 is an apocalyptic number.

22157007 is a deficient number, since it is larger than the sum of its proper divisors (7385673).

22157007 is an equidigital number, since it uses as much as digits as its factorization.

22157007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7385672.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 22157007 is about 4707.1230066783. The cubic root of 22157007 is about 280.8689290487.

The spelling of 22157007 in words is "twenty-two million, one hundred fifty-seven thousand, seven".