156220424 has 8 divisors (see below), whose sum is σ = 292913310. Its totient is φ = 78110208.

The previous prime is 156220411. The next prime is 156220447. The reversal of 156220424 is 424022651.

It can be written as a sum of positive squares in only one way, i.e., 114875524 + 41344900 = 10718^2 + 6430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 156220393 and 156220402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9763769 + ... + 9763784.

Almost surely, 2^156220424 is an apocalyptic number.

It is an amenable number.

156220424 is a deficient number, since it is larger than the sum of its proper divisors (136692886).

156220424 is a wasteful number, since it uses less digits than its factorization.

156220424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19527559 (or 19527555 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 156220424 is about 12498.8169040114. The cubic root of 156220424 is about 538.5746865980.

The spelling of 156220424 in words is "one hundred fifty-six million, two hundred twenty thousand, four hundred twenty-four".