155240245 has 8 divisors (see below), whose sum is σ = 187103160. Its totient is φ = 123648960.

The previous prime is 155240213. The next prime is 155240251. The reversal of 155240245 is 542042551.

It can be written as a sum of positive squares in 4 ways, for example, as 41049649 + 114190596 = 6407^2 + 10686^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155240245 - 2⁵ = 155240213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66646 + ... + 68935.

It is an arithmetic number, because the mean of its divisors is an integer number (23387895).

Almost surely, 2^155240245 is an apocalyptic number.

It is an amenable number.

155240245 is a deficient number, since it is larger than the sum of its proper divisors (31862915).

155240245 is a wasteful number, since it uses less digits than its factorization.

155240245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135815.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 155240245 is about 12459.5443335621. The cubic root of 155240245 is about 537.4459235303.

Adding to 155240245 its reverse (542042551), we get a palindrome (697282796).

The spelling of 155240245 in words is "one hundred fifty-five million, two hundred forty thousand, two hundred forty-five".