47621851 has 2 divisors, whose sum is σ = 47621852. Its totient is φ = 47621850.

The previous prime is 47621801. The next prime is 47621897. The reversal of 47621851 is 15812674.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47621851 - 2¹⁵ = 47589083 is a prime.

It is not a weakly prime, because it can be changed into another prime (47621801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23810925 + 23810926.

It is an arithmetic number, because the mean of its divisors is an integer number (23810926).

Almost surely, 2^47621851 is an apocalyptic number.

47621851 is a deficient number, since it is larger than the sum of its proper divisors (1).

47621851 is an equidigital number, since it uses as much as digits as its factorization.

47621851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 47621851 is about 6900.8587146818. The cubic root of 47621851 is about 362.4672369914.

The spelling of 47621851 in words is "forty-seven million, six hundred twenty-one thousand, eight hundred fifty-one".