47551720 has 32 divisors (see below), whose sum is σ = 113286600. Its totient is φ = 17901568.

The previous prime is 47551717. The next prime is 47551727. The reversal of 47551720 is 2715574.

47551720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30758116 + 16793604 = 5546^2 + 4098^2 .

It is a super-2 number, since 2×47551720² = 4522332149916800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47551727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34285 + ... + 35644.

Almost surely, 2^47551720 is an apocalyptic number.

47551720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47551720 is an abundant number, since it is smaller than the sum of its proper divisors (65734880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47551720 is a wasteful number, since it uses less digits than its factorization.

47551720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69957 (or 69953 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 47551720 is about 6895.7755183881. The cubic root of 47551720 is about 362.2892187221.

The spelling of 47551720 in words is "forty-seven million, five hundred fifty-one thousand, seven hundred twenty".