155165420 has 48 divisors (see below), whose sum is σ = 336117600. Its totient is φ = 60125184.

The previous prime is 155165411. The next prime is 155165441. The reversal of 155165420 is 24561551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332027 + ... + 332493.

It is an arithmetic number, because the mean of its divisors is an integer number (7002450).

Almost surely, 2^155165420 is an apocalyptic number.

155165420 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 155165420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168058800).

155165420 is an abundant number, since it is smaller than the sum of its proper divisors (180952180).

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

155165420 is a wasteful number, since it uses less digits than its factorization.

155165420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 155165420 is about 12456.5412534941. The cubic root of 155165420 is about 537.3595609293.

The spelling of 155165420 in words is "one hundred fifty-five million, one hundred sixty-five thousand, four hundred twenty".