153421555 has 16 divisors (see below), whose sum is σ = 213073920. Its totient is φ = 103869792.

The previous prime is 153421537. The next prime is 153421559. The reversal of 153421555 is 555124351.

It is a cyclic number.

It is not a de Polignac number, because 153421555 - 2¹¹ = 153419507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (153421559) 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 15 ways as a sum of consecutive naturals, for example, 24979 + ... + 30508.

It is an arithmetic number, because the mean of its divisors is an integer number (13317120).

Almost surely, 2^153421555 is an apocalyptic number.

153421555 is a deficient number, since it is larger than the sum of its proper divisors (59652365).

153421555 is an equidigital number, since it uses as much as digits as its factorization.

153421555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55578.

The product of its digits is 15000, while the sum is 31.

The square root of 153421555 is about 12386.3455062419. The cubic root of 153421555 is about 535.3388891414.

The spelling of 153421555 in words is "one hundred fifty-three million, four hundred twenty-one thousand, five hundred fifty-five".