1551372731551 has 8 divisors (see below), whose sum is σ = 1646193147984. Its totient is φ = 1456948225920.

The previous prime is 1551372731539. The next prime is 1551372731627.

1551372731551 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1551372731551 - 2¹⁹ = 1551372207263 is a prime.

It is a super-3 number, since 3×1551372731551³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551372761551) 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 7 ways as a sum of consecutive naturals, for example, 98969625 + ... + 98985298.

It is an arithmetic number, because the mean of its divisors is an integer number (205774143498).

Almost surely, 2^{1551372731551} is an apocalyptic number.

1551372731551 is a deficient number, since it is larger than the sum of its proper divisors (94820416433).

1551372731551 is a wasteful number, since it uses less digits than its factorization.

1551372731551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197955401.

The product of its digits is 551250, while the sum is 46.

The spelling of 1551372731551 in words is "one trillion, five hundred fifty-one billion, three hundred seventy-two million, seven hundred thirty-one thousand, five hundred fifty-one".