47721130 has 32 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 18506880.

The previous prime is 47721071. The next prime is 47721131. The reversal of 47721130 is 3112774.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 47721095 and 47721104.

It is not an unprimeable number, because it can be changed into a prime (47721131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97747 + ... + 98233.

It is an arithmetic number, because the mean of its divisors is an integer number (2766960).

Almost surely, 2^47721130 is an apocalyptic number.

47721130 is a deficient number, since it is larger than the sum of its proper divisors (40821590).

47721130 is a wasteful number, since it uses less digits than its factorization.

47721130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 47721130 is about 6908.0482048115. The cubic root of 47721130 is about 362.7189450225.

The spelling of 47721130 in words is "forty-seven million, seven hundred twenty-one thousand, one hundred thirty".