48615821 has 2 divisors, whose sum is σ = 48615822. Its totient is φ = 48615820.

The previous prime is 48615811. The next prime is 48615829. The reversal of 48615821 is 12851684.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 17757796 = 5555^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 48615821 - 2¹⁸ = 48353677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48615829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24307910 + 24307911.

It is an arithmetic number, because the mean of its divisors is an integer number (24307911).

Almost surely, 2^48615821 is an apocalyptic number.

It is an amenable number.

48615821 is a deficient number, since it is larger than the sum of its proper divisors (1).

48615821 is an equidigital number, since it uses as much as digits as its factorization.

48615821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 35.

The square root of 48615821 is about 6972.5046432398. The cubic root of 48615821 is about 364.9717148282.

The spelling of 48615821 in words is "forty-eight million, six hundred fifteen thousand, eight hundred twenty-one".