155247241 has 4 divisors (see below), whose sum is σ = 157564432. Its totient is φ = 152930052.

The previous prime is 155247223. The next prime is 155247277. The reversal of 155247241 is 142742551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155247241 is a prime.

It is a super-2 number, since 2×155247241² = 48203411676224162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155247221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158495 + ... + 1158628.

It is an arithmetic number, because the mean of its divisors is an integer number (39391108).

Almost surely, 2^155247241 is an apocalyptic number.

It is an amenable number.

155247241 is a deficient number, since it is larger than the sum of its proper divisors (2317191).

155247241 is an equidigital number, since it uses as much as digits as its factorization.

155247241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317190.

The product of its digits is 11200, while the sum is 31.

The square root of 155247241 is about 12459.8250790290. The cubic root of 155247241 is about 537.4539968561.

Adding to 155247241 its reverse (142742551), we get a palindrome (297989792).

The spelling of 155247241 in words is "one hundred fifty-five million, two hundred forty-seven thousand, two hundred forty-one".