100142722 has 4 divisors (see below), whose sum is σ = 150214086. Its totient is φ = 50071360.

The previous prime is 100142717. The next prime is 100142723. The reversal of 100142722 is 227241001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227241001 = 13 ⋅17480077.

It can be written as a sum of positive squares in only one way, i.e., 94848121 + 5294601 = 9739^2 + 2301^2 .

It is a super-3 number, since 3×100142722³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100142722.

It is not an unprimeable number, because it can be changed into a prime (100142723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25035679 + ... + 25035682.

Almost surely, 2^100142722 is an apocalyptic number.

100142722 is a deficient number, since it is larger than the sum of its proper divisors (50071364).

100142722 is an equidigital number, since it uses as much as digits as its factorization.

100142722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50071363.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 100142722 is about 10007.1335556192. The cubic root of 100142722 is about 464.3795973393.

Adding to 100142722 its reverse (227241001), we get a palindrome (327383723).

The spelling of 100142722 in words is "one hundred million, one hundred forty-two thousand, seven hundred twenty-two".