1551551234258 has 4 divisors (see below), whose sum is σ = 2327326851390. Its totient is φ = 775775617128.

The previous prime is 1551551234257. The next prime is 1551551234293. The reversal of 1551551234258 is 8524321551551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1548489050689 + 3062183569 = 1244383^2 + 55337^2 .

It is a super-2 number, since 2×1551551234258² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1551551234257) 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 as a sum of consecutive naturals, namely, 387887808563 + ... + 387887808566.

Almost surely, 2^{1551551234258} is an apocalyptic number.

1551551234258 is a deficient number, since it is larger than the sum of its proper divisors (775775617132).

1551551234258 is an equidigital number, since it uses as much as digits as its factorization.

1551551234258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775775617131.

The product of its digits is 1200000, while the sum is 47.

The spelling of 1551551234258 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, two hundred fifty-eight".