22157501 has 2 divisors, whose sum is σ = 22157502. Its totient is φ = 22157500.

The previous prime is 22157497. The next prime is 22157519. The reversal of 22157501 is 10575122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20693401 + 1464100 = 4549^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 22157501 - 2² = 22157497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22157581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078750 + 11078751.

It is an arithmetic number, because the mean of its divisors is an integer number (11078751).

Almost surely, 2^22157501 is an apocalyptic number.

It is an amenable number.

22157501 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157501 is an equidigital number, since it uses as much as digits as its factorization.

22157501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 22157501 is about 4707.1754800517. The cubic root of 22157501 is about 280.8710163978.

The spelling of 22157501 in words is "twenty-two million, one hundred fifty-seven thousand, five hundred one".