1551022151423 has 4 divisors (see below), whose sum is σ = 1557678899088. Its totient is φ = 1544365403760.

The previous prime is 1551022151351. The next prime is 1551022151461. The reversal of 1551022151423 is 3241512201551.

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

It is a cyclic number.

It is not a de Polignac number, because 1551022151423 - 2¹² = 1551022147327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551022151423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551522151423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3328373483 + ... + 3328373948.

It is an arithmetic number, because the mean of its divisors is an integer number (389419724772).

Almost surely, 2^{1551022151423} is an apocalyptic number.

1551022151423 is a deficient number, since it is larger than the sum of its proper divisors (6656747665).

1551022151423 is an equidigital number, since it uses as much as digits as its factorization.

1551022151423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656747664.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 1551022151423 its reverse (3241512201551), we get a palindrome (4792534352974).

The spelling of 1551022151423 in words is "one trillion, five hundred fifty-one billion, twenty-two million, one hundred fifty-one thousand, four hundred twenty-three".