51478953 has 8 divisors (see below), whose sum is σ = 69933888. Its totient is φ = 33671664.

The previous prime is 51478949. The next prime is 51478957. The reversal of 51478953 is 35987415.

It is an interprime number because it is at equal distance from previous prime (51478949) and next prime (51478957).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51478953 - 2² = 51478949 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51478957) 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, 161725 + ... + 162042.

It is an arithmetic number, because the mean of its divisors is an integer number (8741736).

Almost surely, 2^51478953 is an apocalyptic number.

51478953 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51478953 is a deficient number, since it is larger than the sum of its proper divisors (18454935).

51478953 is a wasteful number, since it uses less digits than its factorization.

51478953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323823.

The product of its digits is 151200, while the sum is 42.

The square root of 51478953 is about 7174.8834833745. The cubic root of 51478953 is about 372.0002529192. Note that the first 3 decimals are identical.

The spelling of 51478953 in words is "fifty-one million, four hundred seventy-eight thousand, nine hundred fifty-three".