155421414 has 48 divisors (see below), whose sum is σ = 352594944. Its totient is φ = 49417200.

The previous prime is 155421407. The next prime is 155421439. The reversal of 155421414 is 414124551.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 37657 + ... + 41579.

It is an arithmetic number, because the mean of its divisors is an integer number (7345728).

Almost surely, 2^155421414 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155421414, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176297472).

155421414 is an abundant number, since it is smaller than the sum of its proper divisors (197173530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155421414 is a wasteful number, since it uses less digits than its factorization.

155421414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033 (or 4030 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 155421414 is about 12466.8125036033. The cubic root of 155421414 is about 537.6549129109.

Adding to 155421414 its reverse (414124551), we get a palindrome (569545965).

The spelling of 155421414 in words is "one hundred fifty-five million, four hundred twenty-one thousand, four hundred fourteen".