51232151 has 4 divisors (see below), whose sum is σ = 53928600. Its totient is φ = 48535704.

The previous prime is 51232147. The next prime is 51232157. The reversal of 51232151 is 15123215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15123215 = 5 ⋅3024643.

It is a cyclic number.

It is not a de Polignac number, because 51232151 - 2² = 51232147 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 (51232157) 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, 1348196 + ... + 1348233.

It is an arithmetic number, because the mean of its divisors is an integer number (13482150).

Almost surely, 2^51232151 is an apocalyptic number.

51232151 is a deficient number, since it is larger than the sum of its proper divisors (2696449).

51232151 is a wasteful number, since it uses less digits than its factorization.

51232151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696448.

The product of its digits is 300, while the sum is 20.

The square root of 51232151 is about 7157.6637948426. The cubic root of 51232151 is about 371.4048152811.

Adding to 51232151 its reverse (15123215), we get a palindrome (66355366).

The spelling of 51232151 in words is "fifty-one million, two hundred thirty-two thousand, one hundred fifty-one".