51101305 has 4 divisors (see below), whose sum is σ = 61321572. Its totient is φ = 40881040.

The previous prime is 51101291. The next prime is 51101333. The reversal of 51101305 is 50310115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9162729 + 41938576 = 3027^2 + 6476^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51101305 is a prime.

It is a super-2 number, since 2×51101305² = 5222686745406050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110126 + ... + 5110135.

It is an arithmetic number, because the mean of its divisors is an integer number (15330393).

Almost surely, 2^51101305 is an apocalyptic number.

It is an amenable number.

51101305 is a deficient number, since it is larger than the sum of its proper divisors (10220267).

51101305 is a wasteful number, since it uses less digits than its factorization.

51101305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220266.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 51101305 is about 7148.5176785121. The cubic root of 51101305 is about 371.0883586282.

The spelling of 51101305 in words is "fifty-one million, one hundred one thousand, three hundred five".