22215001545 has 128 divisors (see below), whose sum is σ = 43661721600. Its totient is φ = 10627545600.

The previous prime is 22215001541. The next prime is 22215001553. The reversal of 22215001545 is 54510051222.

22215001545 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 500 + 154 + 5 = 666.

It is not a de Polignac number, because 22215001545 - 2² = 22215001541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22215001541) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 58002424 + ... + 58002806.

It is an arithmetic number, because the mean of its divisors is an integer number (341107200).

Almost surely, 2^22215001545 is an apocalyptic number.

It is an amenable number.

22215001545 is a deficient number, since it is larger than the sum of its proper divisors (21446720055).

22215001545 is a wasteful number, since it uses less digits than its factorization.

22215001545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 22215001545 its reverse (54510051222), we get a palindrome (76725052767).

The spelling of 22215001545 in words is "twenty-two billion, two hundred fifteen million, one thousand, five hundred forty-five".