51101405 has 8 divisors (see below), whose sum is σ = 64928952. Its totient is φ = 38476288.

The previous prime is 51101363. The next prime is 51101417. The reversal of 51101405 is 50410115.

It can be written as a sum of positive squares in 4 ways, for example, as 9872164 + 41229241 = 3142^2 + 6421^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51101405 - 2¹⁰ = 51100381 is a prime.

It is a super-2 number, since 2×51101405² = 5222707185948050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300512 + ... + 300681.

It is an arithmetic number, because the mean of its divisors is an integer number (8116119).

Almost surely, 2^51101405 is an apocalyptic number.

It is an amenable number.

51101405 is a deficient number, since it is larger than the sum of its proper divisors (13827547).

51101405 is a wasteful number, since it uses less digits than its factorization.

51101405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601215.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51101405 is about 7148.5246729657. The cubic root of 51101405 is about 371.0886006887.

The spelling of 51101405 in words is "fifty-one million, one hundred one thousand, four hundred five".