156220538 has 16 divisors (see below), whose sum is σ = 237706920. Its totient is φ = 76992000.

The previous prime is 156220529. The next prime is 156220567. The reversal of 156220538 is 835022651.

It can be written as a sum of positive squares in 4 ways, for example, as 155575729 + 644809 = 12473^2 + 803^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 47078 + ... + 50286.

Almost surely, 2^156220538 is an apocalyptic number.

156220538 is a deficient number, since it is larger than the sum of its proper divisors (81486382).

156220538 is a wasteful number, since it uses less digits than its factorization.

156220538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 156220538 is about 12498.8214644422. The cubic root of 156220538 is about 538.5748176041.

The spelling of 156220538 in words is "one hundred fifty-six million, two hundred twenty thousand, five hundred thirty-eight".