157740224209 has 4 divisors (see below), whose sum is σ = 157784252416. Its totient is φ = 157696196004.

The previous prime is 157740224183. The next prime is 157740224251. The reversal of 157740224209 is 902422047751.

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: 902422047751 = 7 ⋅128917435393.

It is a cyclic number.

It is not a de Polignac number, because 157740224209 - 2¹¹ = 157740222161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157740224309) 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, 22008729 + ... + 22015894.

It is an arithmetic number, because the mean of its divisors is an integer number (39446063104).

Almost surely, 2^157740224209 is an apocalyptic number.

It is an amenable number.

157740224209 is a deficient number, since it is larger than the sum of its proper divisors (44028207).

157740224209 is an equidigital number, since it uses as much as digits as its factorization.

157740224209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44028206.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 157740224209 in words is "one hundred fifty-seven billion, seven hundred forty million, two hundred twenty-four thousand, two hundred nine".