100423156 has 6 divisors (see below), whose sum is σ = 175740530. Its totient is φ = 50211576.

The previous prime is 100423153. The next prime is 100423177. The reversal of 100423156 is 651324001.

It can be written as a sum of positive squares in only one way, i.e., 93315600 + 7107556 = 9660^2 + 2666^2 .

It is a super-2 number, since 2×100423156² = 20169620522000672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100423153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12552891 + ... + 12552898.

Almost surely, 2^100423156 is an apocalyptic number.

It is an amenable number.

100423156 is a deficient number, since it is larger than the sum of its proper divisors (75317374).

100423156 is a wasteful number, since it uses less digits than its factorization.

100423156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25105793 (or 25105791 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 100423156 is about 10021.1354646068. The cubic root of 100423156 is about 464.8126674393.

Adding to 100423156 its reverse (651324001), we get a palindrome (751747157).

The spelling of 100423156 in words is "one hundred million, four hundred twenty-three thousand, one hundred fifty-six".