155425540 has 12 divisors (see below), whose sum is σ = 326393676. Its totient is φ = 62170208.

The previous prime is 155425519. The next prime is 155425549. The reversal of 155425540 is 45524551.

It can be written as a sum of positive squares in 2 ways, for example, as 69455556 + 85969984 = 8334^2 + 9272^2 .

It is not an unprimeable number, because it can be changed into a prime (155425549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3885619 + ... + 3885658.

It is an arithmetic number, because the mean of its divisors is an integer number (27199473).

Almost surely, 2^155425540 is an apocalyptic number.

155425540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155425540 is an abundant number, since it is smaller than the sum of its proper divisors (170968136).

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

155425540 is a wasteful number, since it uses less digits than its factorization.

155425540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771286 (or 7771284 counting only the distinct ones).

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

The square root of 155425540 is about 12466.9779818527. The cubic root of 155425540 is about 537.6596706091.

The spelling of 155425540 in words is "one hundred fifty-five million, four hundred twenty-five thousand, five hundred forty".