156993530 has 32 divisors (see below), whose sum is σ = 295399440. Its totient is φ = 59996160.

The previous prime is 156993509. The next prime is 156993593. The reversal of 156993530 is 35399651.

It can be written as a sum of positive squares in 8 ways, for example, as 50965321 + 106028209 = 7139^2 + 10297^2 .

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 15 ways as a sum of consecutive naturals, for example, 25340 + ... + 30920.

Almost surely, 2^156993530 is an apocalyptic number.

156993530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156993530 is a deficient number, since it is larger than the sum of its proper divisors (138405910).

156993530 is a wasteful number, since it uses less digits than its factorization.

156993530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714.

The product of its (nonzero) digits is 109350, while the sum is 41.

The square root of 156993530 is about 12529.7059023746. The cubic root of 156993530 is about 539.4616605680.

The spelling of 156993530 in words is "one hundred fifty-six million, nine hundred ninety-three thousand, five hundred thirty".