155214420 has 96 divisors (see below), whose sum is σ = 484444800. Its totient is φ = 36900864.

The previous prime is 155214383. The next prime is 155214443. The reversal of 155214420 is 24412551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15376 + ... + 23384.

It is an arithmetic number, because the mean of its divisors is an integer number (5046300).

Almost surely, 2^155214420 is an apocalyptic number.

155214420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155214420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242222400).

155214420 is an abundant number, since it is smaller than the sum of its proper divisors (329230380).

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

155214420 is a wasteful number, since it uses less digits than its factorization.

155214420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057 (or 8055 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 155214420 is about 12458.5079363461. The cubic root of 155214420 is about 537.4161195949.

Adding to 155214420 its reverse (24412551), we get a palindrome (179626971).

The spelling of 155214420 in words is "one hundred fifty-five million, two hundred fourteen thousand, four hundred twenty".