48421381 has 2 divisors, whose sum is σ = 48421382. Its totient is φ = 48421380.

The previous prime is 48421379. The next prime is 48421393. The reversal of 48421381 is 18312484.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 188356 = 6945^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 48421381 - 2¹ = 48421379 is a prime.

It is a super-2 number, since 2×48421381² = 4689260275894322, which contains 22 as substring.

Together with 48421379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48421081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24210690 + 24210691.

It is an arithmetic number, because the mean of its divisors is an integer number (24210691).

Almost surely, 2^48421381 is an apocalyptic number.

48421381 is the 3720-th centered heptagonal number.

It is an amenable number.

48421381 is a deficient number, since it is larger than the sum of its proper divisors (1).

48421381 is an equidigital number, since it uses as much as digits as its factorization.

48421381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 48421381 is about 6958.5473340346. The cubic root of 48421381 is about 364.4844940130.

The spelling of 48421381 in words is "forty-eight million, four hundred twenty-one thousand, three hundred eighty-one".