156222541 has 4 divisors (see below), whose sum is σ = 164444800. Its totient is φ = 148000284.

The previous prime is 156222491. The next prime is 156222551. The reversal of 156222541 is 145222651.

156222541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 145222651 = 7 ⋅20746093.

It is a cyclic number.

It is not a de Polignac number, because 156222541 - 2⁷ = 156222413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156222551) 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, 4111101 + ... + 4111138.

It is an arithmetic number, because the mean of its divisors is an integer number (41111200).

Almost surely, 2^156222541 is an apocalyptic number.

It is an amenable number.

156222541 is a deficient number, since it is larger than the sum of its proper divisors (8222259).

156222541 is an equidigital number, since it uses as much as digits as its factorization.

156222541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222258.

The product of its digits is 4800, while the sum is 28.

The square root of 156222541 is about 12498.9015917400. The cubic root of 156222541 is about 538.5771193944.

The spelling of 156222541 in words is "one hundred fifty-six million, two hundred twenty-two thousand, five hundred forty-one".