155314521 has 12 divisors (see below), whose sum is σ = 224545620. Its totient is φ = 103449600.

The previous prime is 155314513. The next prime is 155314573. The reversal of 155314521 is 125413551.

It can be written as a sum of positive squares in 2 ways, for example, as 31304025 + 124010496 = 5595^2 + 11136^2 .

It is not a de Polignac number, because 155314521 - 2³ = 155314513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155314591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3625 + ... + 17993.

It is an arithmetic number, because the mean of its divisors is an integer number (18712135).

Almost surely, 2^155314521 is an apocalyptic number.

It is an amenable number.

155314521 is a deficient number, since it is larger than the sum of its proper divisors (69231099).

155314521 is a wasteful number, since it uses less digits than its factorization.

155314521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15576 (or 15573 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 155314521 is about 12462.5246639676. The cubic root of 155314521 is about 537.5316250367.

The spelling of 155314521 in words is "one hundred fifty-five million, three hundred fourteen thousand, five hundred twenty-one".