551251433514021 has 8 divisors (see below), whose sum is σ = 737004641357184. Its totient is φ = 366499590673440.

The previous prime is 551251433514007. The next prime is 551251433514079. The reversal of 551251433514021 is 120415334152155.

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

It is not a de Polignac number, because 551251433514021 - 2¹⁸ = 551251433251877 is a prime.

It is a super-2 number, since 2×551251433514021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551251433514521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250341249360 + ... + 250341251561.

It is an arithmetic number, because the mean of its divisors is an integer number (92125580169648).

Almost surely, 2^{551251433514021} is an apocalyptic number.

It is an amenable number.

551251433514021 is a deficient number, since it is larger than the sum of its proper divisors (185753207843163).

551251433514021 is a wasteful number, since it uses less digits than its factorization.

551251433514021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500682501291.

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

Adding to 551251433514021 its reverse (120415334152155), we get a palindrome (671666767666176).

The spelling of 551251433514021 in words is "five hundred fifty-one trillion, two hundred fifty-one billion, four hundred thirty-three million, five hundred fourteen thousand, twenty-one".