47549421 has 6 divisors (see below), whose sum is σ = 68682510. Its totient is φ = 31699608.

The previous prime is 47549417. The next prime is 47549423. The reversal of 47549421 is 12494574.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47073321 + 476100 = 6861^2 + 690^2 .

It is not a de Polignac number, because 47549421 - 2² = 47549417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47549423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2641626 + ... + 2641643.

It is an arithmetic number, because the mean of its divisors is an integer number (11447085).

Almost surely, 2^47549421 is an apocalyptic number.

It is an amenable number.

47549421 is a deficient number, since it is larger than the sum of its proper divisors (21133089).

47549421 is a wasteful number, since it uses less digits than its factorization.

47549421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5283275 (or 5283272 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 47549421 is about 6895.6088201115. The cubic root of 47549421 is about 362.2833800526.

The spelling of 47549421 in words is "forty-seven million, five hundred forty-nine thousand, four hundred twenty-one".