51345461 has 4 divisors (see below), whose sum is σ = 51465024. Its totient is φ = 51225900.

The previous prime is 51345439. The next prime is 51345473. The reversal of 51345461 is 16454315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51345461 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 (51345421) 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, 59135 + ... + 59996.

It is an arithmetic number, because the mean of its divisors is an integer number (12866256).

Almost surely, 2^51345461 is an apocalyptic number.

It is an amenable number.

51345461 is a deficient number, since it is larger than the sum of its proper divisors (119563).

51345461 is a wasteful number, since it uses less digits than its factorization.

51345461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119562.

The product of its digits is 7200, while the sum is 29.

The square root of 51345461 is about 7165.5747152619. The cubic root of 51345461 is about 371.6784253174.

Adding to 51345461 its reverse (16454315), we get a palindrome (67799776).

The spelling of 51345461 in words is "fifty-one million, three hundred forty-five thousand, four hundred sixty-one".