47721501 has 32 divisors (see below), whose sum is σ = 74448000. Its totient is φ = 30167424.

The previous prime is 47721491. The next prime is 47721503. The reversal of 47721501 is 10512774.

It is not a de Polignac number, because 47721501 - 2⁵ = 47721469 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47721503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45681 + ... + 46713.

It is an arithmetic number, because the mean of its divisors is an integer number (2326500).

Almost surely, 2^47721501 is an apocalyptic number.

It is an amenable number.

47721501 is a deficient number, since it is larger than the sum of its proper divisors (26726499).

47721501 is a wasteful number, since it uses less digits than its factorization.

47721501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1124 counting only the distinct ones).

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

The square root of 47721501 is about 6908.0750574961. The cubic root of 47721501 is about 362.7198849862.

The spelling of 47721501 in words is "forty-seven million, seven hundred twenty-one thousand, five hundred one".