51448905 has 16 divisors (see below), whose sum is σ = 91464960. Its totient is φ = 27439344.

The previous prime is 51448889. The next prime is 51448909. The reversal of 51448905 is 50984415.

It is not a de Polignac number, because 51448905 - 2⁴ = 51448889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51448905.

It is not an unprimeable number, because it can be changed into a prime (51448909) 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, 190417 + ... + 190686.

It is an arithmetic number, because the mean of its divisors is an integer number (5716560).

Almost surely, 2^51448905 is an apocalyptic number.

It is an amenable number.

51448905 is a deficient number, since it is larger than the sum of its proper divisors (40016055).

51448905 is a wasteful number, since it uses less digits than its factorization.

51448905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381117 (or 381111 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 51448905 is about 7172.7892064385. The cubic root of 51448905 is about 371.9278606212.

The spelling of 51448905 in words is "fifty-one million, four hundred forty-eight thousand, nine hundred five".