51954905 has 8 divisors (see below), whose sum is σ = 62963784. Its totient is φ = 41152000.

The previous prime is 51954899. The next prime is 51954923. The reversal of 51954905 is 50945915.

It can be written as a sum of positive squares in 4 ways, for example, as 28558336 + 23396569 = 5344^2 + 4837^2 .

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

It is not a de Polignac number, because 51954905 - 2⁸ = 51954649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50936 + ... + 51945.

It is an arithmetic number, because the mean of its divisors is an integer number (7870473).

Almost surely, 2^51954905 is an apocalyptic number.

It is an amenable number.

51954905 is a deficient number, since it is larger than the sum of its proper divisors (11008879).

51954905 is a wasteful number, since it uses less digits than its factorization.

51954905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102987.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 51954905 is about 7207.9750970713. The cubic root of 51954905 is about 373.1431885857.

The spelling of 51954905 in words is "fifty-one million, nine hundred fifty-four thousand, nine hundred five".