47155231 has 2 divisors, whose sum is σ = 47155232. Its totient is φ = 47155230.

The previous prime is 47155201. The next prime is 47155237. The reversal of 47155231 is 13255174.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47155231 - 2¹⁹ = 46630943 is a prime.

It is a super-2 number, since 2×47155231² = 4447231621326722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47155231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47155237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23577615 + 23577616.

It is an arithmetic number, because the mean of its divisors is an integer number (23577616).

Almost surely, 2^47155231 is an apocalyptic number.

47155231 is a deficient number, since it is larger than the sum of its proper divisors (1).

47155231 is an equidigital number, since it uses as much as digits as its factorization.

47155231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 47155231 is about 6866.9666520233. The cubic root of 47155231 is about 361.2794775657.

The spelling of 47155231 in words is "forty-seven million, one hundred fifty-five thousand, two hundred thirty-one".