155242245 has 16 divisors (see below), whose sum is σ = 249383232. Its totient is φ = 82464000.

The previous prime is 155242237. The next prime is 155242259. The reversal of 155242245 is 542242551.

It is not a de Polignac number, because 155242245 - 2³ = 155242237 is a prime.

It is a super-4 number, since 4×155242245⁴ (a number of 34 digits) contains 4444 as substring.

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, 16852 + ... + 24381.

It is an arithmetic number, because the mean of its divisors is an integer number (15586452).

Almost surely, 2^155242245 is an apocalyptic number.

155242245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155242245 is a deficient number, since it is larger than the sum of its proper divisors (94140987).

155242245 is a wasteful number, since it uses less digits than its factorization.

155242245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41492.

The product of its digits is 16000, while the sum is 30.

The square root of 155242245 is about 12459.6245930606. The cubic root of 155242245 is about 537.4482315384.

Adding to 155242245 its reverse (542242551), we get a palindrome (697484796).

The spelling of 155242245 in words is "one hundred fifty-five million, two hundred forty-two thousand, two hundred forty-five".