22145231425 has 24 divisors (see below), whose sum is σ = 27971703000. Its totient is φ = 17389025280.

The previous prime is 22145231419. The next prime is 22145231467. The reversal of 22145231425 is 52413254122.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 10856806416 + 11288425009 = 104196^2 + 106247^2 .

It is not a de Polignac number, because 22145231425 - 2¹⁷ = 22145100353 is a prime.

It is a super-2 number, since 2×22145231425² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268501 + ... + 341149.

It is an arithmetic number, because the mean of its divisors is an integer number (1165487625).

Almost surely, 2^22145231425 is an apocalyptic number.

22145231425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22145231425 is a deficient number, since it is larger than the sum of its proper divisors (5826471575).

22145231425 is a wasteful number, since it uses less digits than its factorization.

22145231425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72885 (or 72880 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

Adding to 22145231425 its reverse (52413254122), we get a palindrome (74558485547).

The spelling of 22145231425 in words is "twenty-two billion, one hundred forty-five million, two hundred thirty-one thousand, four hundred twenty-five".