153155421 has 8 divisors (see below), whose sum is σ = 226896960. Its totient is φ = 102103596.

The previous prime is 153155399. The next prime is 153155423. The reversal of 153155421 is 124551351.

It is not a de Polignac number, because 153155421 - 2¹¹ = 153153373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5672423 = 153155421 / (1 + 5 + 3 + 1 + 5 + 5 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153155423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2836185 + ... + 2836238.

It is an arithmetic number, because the mean of its divisors is an integer number (28362120).

Almost surely, 2^153155421 is an apocalyptic number.

It is an amenable number.

153155421 is a deficient number, since it is larger than the sum of its proper divisors (73741539).

153155421 is an equidigital number, since it uses as much as digits as its factorization.

153155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672432 (or 5672426 counting only the distinct ones).

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

The square root of 153155421 is about 12375.5978037427. The cubic root of 153155421 is about 535.0291666051.

It can be divided in two parts, 15315 and 5421, that added together give a 4-th power (20736 = 12⁴).

The spelling of 153155421 in words is "one hundred fifty-three million, one hundred fifty-five thousand, four hundred twenty-one".