51351447 has 16 divisors (see below), whose sum is σ = 79534592. Its totient is φ = 28861920.

The previous prime is 51351439. The next prime is 51351451. The reversal of 51351447 is 74415315.

It is not a de Polignac number, because 51351447 - 2³ = 51351439 is a prime.

It is a super-2 number, since 2×51351447² = 5273942217987618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51351437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18763 + ... + 21324.

It is an arithmetic number, because the mean of its divisors is an integer number (4970912).

Almost surely, 2^51351447 is an apocalyptic number.

51351447 is a deficient number, since it is larger than the sum of its proper divisors (28183145).

51351447 is a wasteful number, since it uses less digits than its factorization.

51351447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40158.

The product of its digits is 8400, while the sum is 30.

The square root of 51351447 is about 7165.9923946373. The cubic root of 51351447 is about 371.6928685324.

The spelling of 51351447 in words is "fifty-one million, three hundred fifty-one thousand, four hundred forty-seven".