47151720 has 384 divisors, whose sum is σ = 201916800. Its totient is φ = 9797760.

The previous prime is 47151707. The next prime is 47151733. The reversal of 47151720 is 2715174.

It is an interprime number because it is at equal distance from previous prime (47151707) and next prime (47151733).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4286515 + ... + 4286525.

It is an arithmetic number, because the mean of its divisors is an integer number (525825).

Almost surely, 2^47151720 is an apocalyptic number.

47151720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47151720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100958400).

47151720 is an abundant number, since it is smaller than the sum of its proper divisors (154765080).

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

47151720 is a wasteful number, since it uses less digits than its factorization.

47151720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 47151720 is about 6866.7110030931. The cubic root of 47151720 is about 361.2705108424.

Adding to 47151720 its reverse (2715174), we get a palindrome (49866894).

The spelling of 47151720 in words is "forty-seven million, one hundred fifty-one thousand, seven hundred twenty".