51121270 has 8 divisors (see below), whose sum is σ = 92018304. Its totient is φ = 20448504.

The previous prime is 51121253. The next prime is 51121307. The reversal of 51121270 is 7212115.

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

It is a super-2 number, since 2×51121270² = 5226768492825800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556054 + ... + 2556073.

It is an arithmetic number, because the mean of its divisors is an integer number (11502288).

Almost surely, 2^51121270 is an apocalyptic number.

51121270 is a deficient number, since it is larger than the sum of its proper divisors (40897034).

51121270 is a wasteful number, since it uses less digits than its factorization.

51121270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112134.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 51121270 is about 7149.9139854966. The cubic root of 51121270 is about 371.1366797323.

Adding to 51121270 its reverse (7212115), we get a palindrome (58333385).

The spelling of 51121270 in words is "fifty-one million, one hundred twenty-one thousand, two hundred seventy".