156054021 has 4 divisors (see below), whose sum is σ = 208072032. Its totient is φ = 104036012.

The previous prime is 156054001. The next prime is 156054047. The reversal of 156054021 is 120450651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 156054021 - 2¹⁰ = 156052997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156053982 and 156054000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156054001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26009001 + ... + 26009006.

It is an arithmetic number, because the mean of its divisors is an integer number (52018008).

Almost surely, 2^156054021 is an apocalyptic number.

It is an amenable number.

156054021 is a deficient number, since it is larger than the sum of its proper divisors (52018011).

156054021 is an equidigital number, since it uses as much as digits as its factorization.

156054021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52018010.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 156054021 is about 12492.1583803601. The cubic root of 156054021 is about 538.3833921847.

The spelling of 156054021 in words is "one hundred fifty-six million, fifty-four thousand, twenty-one".