155235540 has 48 divisors (see below), whose sum is σ = 435492288. Its totient is φ = 41316864.

The previous prime is 155235527. The next prime is 155235581. The reversal of 155235540 is 45532551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 155235498 and 155235507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33399 + ... + 37761.

It is an arithmetic number, because the mean of its divisors is an integer number (9072756).

Almost surely, 2^155235540 is an apocalyptic number.

155235540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155235540 is an abundant number, since it is smaller than the sum of its proper divisors (280256748).

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

155235540 is a wasteful number, since it uses less digits than its factorization.

155235540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4966 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155235540 is about 12459.3555210532. The cubic root of 155235540 is about 537.4404938631.

The spelling of 155235540 in words is "one hundred fifty-five million, two hundred thirty-five thousand, five hundred forty".