155541402 has 24 divisors (see below), whose sum is σ = 338760084. Its totient is φ = 51577344.

The previous prime is 155541383. The next prime is 155541403. The reversal of 155541402 is 204145551.

It can be written as a sum of positive squares in 2 ways, for example, as 155226681 + 314721 = 12459^2 + 561^2 .

It is a super-2 number, since 2×155541402² = 48386255472251208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155541403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18913 + ... + 25860.

Almost surely, 2^155541402 is an apocalyptic number.

155541402 is an abundant number, since it is smaller than the sum of its proper divisors (183218682).

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

155541402 is a wasteful number, since it uses less digits than its factorization.

155541402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44974 (or 44971 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 155541402 is about 12471.6238718140. The cubic root of 155541402 is about 537.7932369287.

Adding to 155541402 its reverse (204145551), we get a palindrome (359686953).

The spelling of 155541402 in words is "one hundred fifty-five million, five hundred forty-one thousand, four hundred two".