51520105 has 32 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 32389632.

The previous prime is 51520103. The next prime is 51520121. The reversal of 51520105 is 50102515.

It is a cyclic number.

It is not a de Polignac number, because 51520105 - 2¹ = 51520103 is a prime.

It is a super-2 number, since 2×51520105² = 5308642438422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51520103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90261 + ... + 90829.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^51520105 is an apocalyptic number.

It is an amenable number.

51520105 is a deficient number, since it is larger than the sum of its proper divisors (25087895).

51520105 is a wasteful number, since it uses less digits than its factorization.

51520105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 51520105 is about 7177.7506922434. The cubic root of 51520105 is about 372.0993515226.

The spelling of 51520105 in words is "fifty-one million, five hundred twenty thousand, one hundred five".