156212820 has 48 divisors (see below), whose sum is σ = 485997120. Its totient is φ = 41656608.

The previous prime is 156212789. The next prime is 156212839. The reversal of 156212820 is 28212651.

It is a happy number.

156212820 is a `hidden beast` number, since 15 + 621 + 2 + 8 + 20 = 666.

156212820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144102 + ... + 145181.

It is an arithmetic number, because the mean of its divisors is an integer number (10124940).

Almost surely, 2^156212820 is an apocalyptic number.

156212820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156212820 is an abundant number, since it is smaller than the sum of its proper divisors (329784300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156212820 is a wasteful number, since it uses less digits than its factorization.

156212820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289301 (or 289293 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 156212820 is about 12498.5127115189. The cubic root of 156212820 is about 538.5659481154.

The spelling of 156212820 in words is "one hundred fifty-six million, two hundred twelve thousand, eight hundred twenty".