155245540 has 12 divisors (see below), whose sum is σ = 326015676. Its totient is φ = 62098208.

The previous prime is 155245537. The next prime is 155245553. The reversal of 155245540 is 45542551.

It can be written as a sum of positive squares in 2 ways, for example, as 47251876 + 107993664 = 6874^2 + 10392^2 .

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 3 ways as a sum of consecutive naturals, for example, 3881119 + ... + 3881158.

It is an arithmetic number, because the mean of its divisors is an integer number (27167973).

Almost surely, 2^155245540 is an apocalyptic number.

155245540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155245540 is an abundant number, since it is smaller than the sum of its proper divisors (170770136).

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

155245540 is a wasteful number, since it uses less digits than its factorization.

155245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7762286 (or 7762284 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 155245540 is about 12459.7568194568. The cubic root of 155245540 is about 537.4520339385.

The spelling of 155245540 in words is "one hundred fifty-five million, two hundred forty-five thousand, five hundred forty".