155042210 has 48 divisors (see below), whose sum is σ = 305423784. Its totient is φ = 56429568.

The previous prime is 155042113. The next prime is 155042231. The reversal of 155042210 is 12240551.

It can be written as a sum of positive squares in 12 ways, for example, as 33535681 + 121506529 = 5791^2 + 11023^2 .

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, 987452 + ... + 987608.

Almost surely, 2^155042210 is an apocalyptic number.

155042210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155042210 is a deficient number, since it is larger than the sum of its proper divisors (150381574).

155042210 is a wasteful number, since it uses less digits than its factorization.

155042210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 155042210 is about 12451.5946769882. The cubic root of 155042210 is about 537.2172921095.

Adding to 155042210 its reverse (12240551), we get a palindrome (167282761).

The spelling of 155042210 in words is "one hundred fifty-five million, forty-two thousand, two hundred ten".