156163421 has 16 divisors (see below), whose sum is σ = 163762368. Its totient is φ = 148780800.

The previous prime is 156163373. The next prime is 156163453. The reversal of 156163421 is 124361651.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 156163421 - 2¹⁴ = 156147037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156163621) 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 in 15 ways as a sum of consecutive naturals, for example, 647861 + ... + 648101.

It is an arithmetic number, because the mean of its divisors is an integer number (10235148).

Almost surely, 2^156163421 is an apocalyptic number.

It is an amenable number.

156163421 is a deficient number, since it is larger than the sum of its proper divisors (7598947).

156163421 is a wasteful number, since it uses less digits than its factorization.

156163421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572.

The product of its digits is 4320, while the sum is 29.

The square root of 156163421 is about 12496.5363601280. The cubic root of 156163421 is about 538.5091721006.

The spelling of 156163421 in words is "one hundred fifty-six million, one hundred sixty-three thousand, four hundred twenty-one".