155303421 has 16 divisors (see below), whose sum is σ = 254857344. Its totient is φ = 81918144.

The previous prime is 155303419. The next prime is 155303431. The reversal of 155303421 is 124303551.

It is not a de Polignac number, because 155303421 - 2¹ = 155303419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155303391 and 155303400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155303411) 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 15 ways as a sum of consecutive naturals, for example, 284166 + ... + 284711.

It is an arithmetic number, because the mean of its divisors is an integer number (15928584).

Almost surely, 2^155303421 is an apocalyptic number.

It is an amenable number.

155303421 is a deficient number, since it is larger than the sum of its proper divisors (99553923).

155303421 is a wasteful number, since it uses less digits than its factorization.

155303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568900.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 155303421 is about 12462.0793208838. The cubic root of 155303421 is about 537.5188193158.

Adding to 155303421 its reverse (124303551), we get a palindrome (279606972).

The spelling of 155303421 in words is "one hundred fifty-five million, three hundred three thousand, four hundred twenty-one".