155212454 has 12 divisors (see below), whose sum is σ = 236067876. Its totient is φ = 76537872.

The previous prime is 155212439. The next prime is 155212459. The reversal of 155212454 is 454212551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155212459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3377 + ... + 17939.

It is an arithmetic number, because the mean of its divisors is an integer number (19672323).

Almost surely, 2^155212454 is an apocalyptic number.

155212454 is a deficient number, since it is larger than the sum of its proper divisors (80855422).

155212454 is an equidigital number, since it uses as much as digits as its factorization.

155212454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14711 (or 14638 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 155212454 is about 12458.4290341921. The cubic root of 155212454 is about 537.4138505520.

The spelling of 155212454 in words is "one hundred fifty-five million, two hundred twelve thousand, four hundred fifty-four".