155224741 has 4 divisors (see below), whose sum is σ = 177399712. Its totient is φ = 133049772.

The previous prime is 155224721. The next prime is 155224747. The reversal of 155224741 is 147422551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 147422551 = 73 ⋅2019487.

It is a cyclic number.

It is not a de Polignac number, because 155224741 - 2⁵ = 155224709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155224747) 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, 11087475 + ... + 11087488.

It is an arithmetic number, because the mean of its divisors is an integer number (44349928).

Almost surely, 2^155224741 is an apocalyptic number.

It is an amenable number.

155224741 is a deficient number, since it is larger than the sum of its proper divisors (22174971).

155224741 is an equidigital number, since it uses as much as digits as its factorization.

155224741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22174970.

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

The square root of 155224741 is about 12458.9221443911. The cubic root of 155224741 is about 537.4280311790.

The spelling of 155224741 in words is "one hundred fifty-five million, two hundred twenty-four thousand, seven hundred forty-one".