51420105 has 48 divisors (see below), whose sum is σ = 98631936. Its totient is φ = 24572160.

The previous prime is 51420097. The next prime is 51420107. The reversal of 51420105 is 50102415.

It is not a de Polignac number, because 51420105 - 2³ = 51420097 is a prime.

It is a super-2 number, since 2×51420105² = 5288054396422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51420107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35424 + ... + 36846.

It is an arithmetic number, because the mean of its divisors is an integer number (2054832).

Almost surely, 2^51420105 is an apocalyptic number.

51420105 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51420105 is a deficient number, since it is larger than the sum of its proper divisors (47211831).

51420105 is a wasteful number, since it uses less digits than its factorization.

51420105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51420105 is about 7170.7813381807. The cubic root of 51420105 is about 371.8584485725.

The spelling of 51420105 in words is "fifty-one million, four hundred twenty thousand, one hundred five".