47051231 has 4 divisors (see below), whose sum is σ = 48198864. Its totient is φ = 45903600.

The previous prime is 47051197. The next prime is 47051233. The reversal of 47051231 is 13215074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13215074 = 2 ⋅6607537.

It is not a de Polignac number, because 47051231 - 2²² = 42856927 is a prime.

It is a super-2 number, since 2×47051231² = 4427636677230722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47051197 and 47051206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47051233) 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, 573755 + ... + 573836.

It is an arithmetic number, because the mean of its divisors is an integer number (12049716).

Almost surely, 2^47051231 is an apocalyptic number.

47051231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

47051231 is a deficient number, since it is larger than the sum of its proper divisors (1147633).

47051231 is a wasteful number, since it uses less digits than its factorization.

47051231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147632.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 47051231 is about 6859.3899874552. The cubic root of 47051231 is about 361.0136836407.

The spelling of 47051231 in words is "forty-seven million, fifty-one thousand, two hundred thirty-one".