51151211 has 4 divisors (see below), whose sum is σ = 53843400. Its totient is φ = 48459024.

The previous prime is 51151207. The next prime is 51151223. The reversal of 51151211 is 11215115.

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

It is a cyclic number.

It is not a de Polignac number, because 51151211 - 2² = 51151207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51151211.

It is not an unprimeable number, because it can be changed into a prime (51159211) by changing a digit.

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, 1346066 + ... + 1346103.

It is an arithmetic number, because the mean of its divisors is an integer number (13460850).

Almost surely, 2^51151211 is an apocalyptic number.

51151211 is a deficient number, since it is larger than the sum of its proper divisors (2692189).

51151211 is a wasteful number, since it uses less digits than its factorization.

51151211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692188.

The product of its digits is 50, while the sum is 17.

The square root of 51151211 is about 7152.0074804211. The cubic root of 51151211 is about 371.2091220811.

Adding to 51151211 its reverse (11215115), we get a palindrome (62366326).

The spelling of 51151211 in words is "fifty-one million, one hundred fifty-one thousand, two hundred eleven".