1551551234226 has 64 divisors (see below), whose sum is σ = 3553920921600. Its totient is φ = 442361589696.

The previous prime is 1551551234209. The next prime is 1551551234227. The reversal of 1551551234226 is 6224321551551.

It is a happy number.

It is a super-2 number, since 2×1551551234226² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1551551234227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39059091 + ... + 39098793.

It is an arithmetic number, because the mean of its divisors is an integer number (55530014400).

Almost surely, 2^{1551551234226} is an apocalyptic number.

1551551234226 is an abundant number, since it is smaller than the sum of its proper divisors (2002369687374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551551234226 is a wasteful number, since it uses less digits than its factorization.

1551551234226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41663.

The product of its digits is 360000, while the sum is 42.

Adding to 1551551234226 its reverse (6224321551551), we get a palindrome (7775872785777).

The spelling of 1551551234226 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, two hundred twenty-six".