1551001340233 has 4 divisors (see below), whose sum is σ = 1551005458708. Its totient is φ = 1550997221760.

The previous prime is 1551001340209. The next prime is 1551001340257. The reversal of 1551001340233 is 3320431001551.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1551001340209) and next prime (1551001340257).

It can be written as a sum of positive squares in 2 ways, for example, as 1016410781584 + 534590558649 = 1008172^2 + 731157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551001340233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551001340533) 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 3 ways as a sum of consecutive naturals, for example, 1430316 + ... + 2268877.

It is an arithmetic number, because the mean of its divisors is an integer number (387751364677).

Almost surely, 2^{1551001340233} is an apocalyptic number.

It is an amenable number.

1551001340233 is a deficient number, since it is larger than the sum of its proper divisors (4118475).

1551001340233 is an equidigital number, since it uses as much as digits as its factorization.

1551001340233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118474.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 1551001340233 its reverse (3320431001551), we get a palindrome (4871432341784).

The spelling of 1551001340233 in words is "one trillion, five hundred fifty-one billion, one million, three hundred forty thousand, two hundred thirty-three".