155242250 has 32 divisors (see below), whose sum is σ = 291374928. Its totient is φ = 61934400.

The previous prime is 155242237. The next prime is 155242259. The reversal of 155242250 is 52242551.

155242250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 43072969 + 112169281 = 6563^2 + 10591^2 .

It is not an unprimeable number, because it can be changed into a prime (155242259) 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 15 ways as a sum of consecutive naturals, for example, 152744 + ... + 153756.

Almost surely, 2^155242250 is an apocalyptic number.

155242250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155242250 is a deficient number, since it is larger than the sum of its proper divisors (136132678).

155242250 is a wasteful number, since it uses less digits than its factorization.

155242250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 155242250 is about 12459.6247937087. The cubic root of 155242250 is about 537.4482373084.

The spelling of 155242250 in words is "one hundred fifty-five million, two hundred forty-two thousand, two hundred fifty".