511222225001 has 8 divisors (see below), whose sum is σ = 512314156200. Its totient is φ = 510131404800.

The previous prime is 511222224983. The next prime is 511222225051. The reversal of 511222225001 is 100522222115.

It can be written as a sum of positive squares in 4 ways, for example, as 32428806400 + 478793418601 = 180080^2 + 691949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 511222225001 - 2⁶ = 511222224937 is a prime.

It is a super-2 number, since 2×511222225001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511222225051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646805 + ... + 1200333.

It is an arithmetic number, because the mean of its divisors is an integer number (64039269525).

Almost surely, 2^511222225001 is an apocalyptic number.

It is an amenable number.

511222225001 is a deficient number, since it is larger than the sum of its proper divisors (1091931199).

511222225001 is a wasteful number, since it uses less digits than its factorization.

511222225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555499.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 511222225001 its reverse (100522222115), we get a palindrome (611744447116).

The spelling of 511222225001 in words is "five hundred eleven billion, two hundred twenty-two million, two hundred twenty-five thousand, one".