157722 has 16 divisors (see below), whose sum is σ = 319872. Its totient is φ = 51840.

The previous prime is 157721. The next prime is 157733. The reversal of 157722 is 227751.

It is a plaindrome in base 7.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 157692 and 157701.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 157722.

It is not an unprimeable number, because it can be changed into a prime (157721) 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 7 ways as a sum of consecutive naturals, for example, 447 + ... + 717.

It is an arithmetic number, because the mean of its divisors is an integer number (19992).

2¹⁵⁷⁷²² is an apocalyptic number.

157722 is an abundant number, since it is smaller than the sum of its proper divisors (162150).

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

157722 is a wasteful number, since it uses less digits than its factorization.

157722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its digits is 980, while the sum is 24.

The square root of 157722 is about 397.1422918804. The cubic root of 157722 is about 54.0294763626.

The spelling of 157722 in words is "one hundred fifty-seven thousand, seven hundred twenty-two".