47278451 has 8 divisors (see below), whose sum is σ = 52004208. Its totient is φ = 42979200.

The previous prime is 47278433. The next prime is 47278459. The reversal of 47278451 is 15487274.

It is not a de Polignac number, because 47278451 - 2¹⁴ = 47262067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47278459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16430 + ... + 19091.

It is an arithmetic number, because the mean of its divisors is an integer number (6500526).

Almost surely, 2^47278451 is an apocalyptic number.

47278451 is a deficient number, since it is larger than the sum of its proper divisors (4725757).

47278451 is an equidigital number, since it uses as much as digits as its factorization.

47278451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35554 (or 35532 counting only the distinct ones).

The product of its digits is 62720, while the sum is 38.

The square root of 47278451 is about 6875.9327367274. The cubic root of 47278451 is about 361.5938869269.

The spelling of 47278451 in words is "forty-seven million, two hundred seventy-eight thousand, four hundred fifty-one".