47131213 has 4 divisors (see below), whose sum is σ = 47238048. Its totient is φ = 47024380.

The previous prime is 47131211. The next prime is 47131219. The reversal of 47131213 is 31213174.

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 47131213 - 2¹ = 47131211 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 (47131211) 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, 52753 + ... + 53638.

It is an arithmetic number, because the mean of its divisors is an integer number (11809512).

Almost surely, 2^47131213 is an apocalyptic number.

It is an amenable number.

47131213 is a deficient number, since it is larger than the sum of its proper divisors (106835).

47131213 is a wasteful number, since it uses less digits than its factorization.

47131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106834.

The product of its digits is 504, while the sum is 22.

The square root of 47131213 is about 6865.2176221880. The cubic root of 47131213 is about 361.2181292350.

Adding to 47131213 its reverse (31213174), we get a palindrome (78344387).

It can be divided in two parts, 471 and 31213, that added together give a square (31684 = 178²).

The spelling of 47131213 in words is "forty-seven million, one hundred thirty-one thousand, two hundred thirteen".