51031151 has 4 divisors (see below), whose sum is σ = 51087600. Its totient is φ = 50974704.

The previous prime is 51031147. The next prime is 51031157. The reversal of 51031151 is 15113015.

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 51031151 - 2² = 51031147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51031157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26846 + ... + 28683.

It is an arithmetic number, because the mean of its divisors is an integer number (12771900).

Almost surely, 2^51031151 is an apocalyptic number.

51031151 is a deficient number, since it is larger than the sum of its proper divisors (56449).

51031151 is an equidigital number, since it uses as much as digits as its factorization.

51031151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56448.

The product of its (nonzero) digits is 75, while the sum is 17.

The square root of 51031151 is about 7143.6091018476. The cubic root of 51031151 is about 370.9184656740.

Adding to 51031151 its reverse (15113015), we get a palindrome (66144166).

The spelling of 51031151 in words is "fifty-one million, thirty-one thousand, one hundred fifty-one".