156051493 has 4 divisors (see below), whose sum is σ = 168055468. Its totient is φ = 144047520.

The previous prime is 156051491. The next prime is 156051521. The reversal of 156051493 is 394150651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97574884 + 58476609 = 9878^2 + 7647^2 .

It is a cyclic number.

It is not a de Polignac number, because 156051493 - 2¹ = 156051491 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 (156051491) 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, 6001968 + ... + 6001993.

It is an arithmetic number, because the mean of its divisors is an integer number (42013867).

Almost surely, 2^156051493 is an apocalyptic number.

156051493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156051493 is a deficient number, since it is larger than the sum of its proper divisors (12003975).

156051493 is a wasteful number, since it uses less digits than its factorization.

156051493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12003974.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 156051493 is about 12492.0571964749. The cubic root of 156051493 is about 538.3804849850.

The spelling of 156051493 in words is "one hundred fifty-six million, fifty-one thousand, four hundred ninety-three".