156240073 has 4 divisors (see below), whose sum is σ = 170443728. Its totient is φ = 142036420.

The previous prime is 156240061. The next prime is 156240121. The reversal of 156240073 is 370042651.

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 a de Polignac number, because none of the positive numbers 2^k-156240073 is a prime.

It is a super-2 number, since 2×156240073² = 48821920822090658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156240043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7101811 + ... + 7101832.

It is an arithmetic number, because the mean of its divisors is an integer number (42610932).

Almost surely, 2^156240073 is an apocalyptic number.

It is an amenable number.

156240073 is a deficient number, since it is larger than the sum of its proper divisors (14203655).

156240073 is a wasteful number, since it uses less digits than its factorization.

156240073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14203654.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 156240073 is about 12499.6029136929. The cubic root of 156240073 is about 538.5972658274.

The spelling of 156240073 in words is "one hundred fifty-six million, two hundred forty thousand, seventy-three".