151722 has 12 divisors (see below), whose sum is σ = 328770. Its totient is φ = 50568.

The previous prime is 151717. The next prime is 151729. The reversal of 151722 is 227151.

It can be written as a sum of positive squares in only one way, i.e., 145161 + 6561 = 381^2 + 81^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 8429 = 151722 / (1 + 5 + 1 + 7 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 151695 and 151704.

It is not an unprimeable number, because it can be changed into a prime (151729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4197 + ... + 4232.

2¹⁵¹⁷²² is an apocalyptic number.

151722 is an abundant number, since it is smaller than the sum of its proper divisors (177048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151722 is a wasteful number, since it uses less digits than its factorization.

151722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437 (or 8434 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 151722 is about 389.5150831483. The cubic root of 151722 is about 53.3354773444.

Adding to 151722 its reverse (227151), we get a palindrome (378873).

The spelling of 151722 in words is "one hundred fifty-one thousand, seven hundred twenty-two".