47238157 has 4 divisors (see below), whose sum is σ = 47256700. Its totient is φ = 47219616.

The previous prime is 47238143. The next prime is 47238193. The reversal of 47238157 is 75183274.

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 3493161 + 43744996 = 1869^2 + 6614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47238157 is a prime.

It is a super-6 number, since 6×47238157⁶ (a number of 47 digits) contains 666666 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47208157) 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, 4698 + ... + 10795.

It is an arithmetic number, because the mean of its divisors is an integer number (11814175).

Almost surely, 2^47238157 is an apocalyptic number.

It is an amenable number.

47238157 is a deficient number, since it is larger than the sum of its proper divisors (18543).

47238157 is a wasteful number, since it uses less digits than its factorization.

47238157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18542.

The product of its digits is 47040, while the sum is 37.

The square root of 47238157 is about 6873.0020369559. The cubic root of 47238157 is about 361.4911325364.

It can be divided in two parts, 4723 and 8157, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 47238157 in words is "forty-seven million, two hundred thirty-eight thousand, one hundred fifty-seven".