155102020 has 24 divisors (see below), whose sum is σ = 326050200. Its totient is φ = 61976832.

The previous prime is 155102011. The next prime is 155102023. The reversal of 155102020 is 20201551.

155102020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9947716 + 145154304 = 3154^2 + 12048^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155101985 and 155102003.

It is not an unprimeable number, because it can be changed into a prime (155102023) 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, 19146 + ... + 26014.

It is an arithmetic number, because the mean of its divisors is an integer number (13585425).

Almost surely, 2^155102020 is an apocalyptic number.

155102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155102020 is an abundant number, since it is smaller than the sum of its proper divisors (170948180).

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

155102020 is a wasteful number, since it uses less digits than its factorization.

155102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007 (or 8005 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 155102020 is about 12453.9961458160. The cubic root of 155102020 is about 537.2863632686.

Adding to 155102020 its reverse (20201551), we get a palindrome (175303571).

The spelling of 155102020 in words is "one hundred fifty-five million, one hundred two thousand, twenty".