155255510321 has 4 divisors (see below), whose sum is σ = 155256773412. Its totient is φ = 155254247232.

The previous prime is 155255510281. The next prime is 155255510327. The reversal of 155255510321 is 123015552551.

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 16472439025 + 138783071296 = 128345^2 + 372536^2 .

It is a cyclic number.

It is not a de Polignac number, because 155255510321 - 2⁶ = 155255510257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155255510327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424556 + ... + 700541.

It is an arithmetic number, because the mean of its divisors is an integer number (38814193353).

Almost surely, 2^155255510321 is an apocalyptic number.

It is an amenable number.

155255510321 is a deficient number, since it is larger than the sum of its proper divisors (1263091).

155255510321 is a wasteful number, since it uses less digits than its factorization.

155255510321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263090.

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 155255510321 in words is "one hundred fifty-five billion, two hundred fifty-five million, five hundred ten thousand, three hundred twenty-one".