155345200531421 has 4 divisors (see below), whose sum is σ = 155359074366012. Its totient is φ = 155331326696832.

The previous prime is 155345200531357. The next prime is 155345200531513. The reversal of 155345200531421 is 124135002543551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41287371525625 + 114057829005796 = 6425525^2 + 10679786^2 .

It is a cyclic number.

It is not a de Polignac number, because 155345200531421 - 2⁶ = 155345200531357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155345200531621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6936900500 + ... + 6936922893.

It is an arithmetic number, because the mean of its divisors is an integer number (38839768591503).

Almost surely, 2^{155345200531421} is an apocalyptic number.

It is an amenable number.

155345200531421 is a deficient number, since it is larger than the sum of its proper divisors (13873834591).

155345200531421 is a wasteful number, since it uses less digits than its factorization.

155345200531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13873834590.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 155345200531421 in words is "one hundred fifty-five trillion, three hundred forty-five billion, two hundred million, five hundred thirty-one thousand, four hundred twenty-one".