51402117 has 8 divisors (see below), whose sum is σ = 73808224. Its totient is φ = 31632048.

The previous prime is 51402041. The next prime is 51402187. The reversal of 51402117 is 71120415.

It is a happy number.

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

It is not a de Polignac number, because 51402117 - 2¹⁰ = 51401093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51402093 and 51402102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51402187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658963 + ... + 659040.

It is an arithmetic number, because the mean of its divisors is an integer number (9226028).

Almost surely, 2^51402117 is an apocalyptic number.

It is an amenable number.

51402117 is a deficient number, since it is larger than the sum of its proper divisors (22406107).

51402117 is a wasteful number, since it uses less digits than its factorization.

51402117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318019.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 51402117 is about 7169.5269718441. The cubic root of 51402117 is about 371.8150818134.

The spelling of 51402117 in words is "fifty-one million, four hundred two thousand, one hundred seventeen".