157722145 has 16 divisors (see below), whose sum is σ = 216868608. Its totient is φ = 107870400.

The previous prime is 157722143. The next prime is 157722167. The reversal of 157722145 is 541227751.

It is not a de Polignac number, because 157722145 - 2¹ = 157722143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157722145.

It is not an unprimeable number, because it can be changed into a prime (157722143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8220 + ... + 19570.

It is an arithmetic number, because the mean of its divisors is an integer number (13554288).

Almost surely, 2^157722145 is an apocalyptic number.

It is an amenable number.

157722145 is a deficient number, since it is larger than the sum of its proper divisors (59146463).

157722145 is a wasteful number, since it uses less digits than its factorization.

157722145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11760.

The product of its digits is 19600, while the sum is 34.

The square root of 157722145 is about 12558.7477480838. The cubic root of 157722145 is about 540.2949291970.

Adding to 157722145 its reverse (541227751), we get a palindrome (698949896).

The spelling of 157722145 in words is "one hundred fifty-seven million, seven hundred twenty-two thousand, one hundred forty-five".