51146621 has 8 divisors (see below), whose sum is σ = 53186304. Its totient is φ = 49131360.

The previous prime is 51146603. The next prime is 51146653. The reversal of 51146621 is 12664115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51146621 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 (51146671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (6648288).

Almost surely, 2^51146621 is an apocalyptic number.

It is an amenable number.

51146621 is a deficient number, since it is larger than the sum of its proper divisors (2039683).

51146621 is a wasteful number, since it uses less digits than its factorization.

51146621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12211.

The product of its digits is 1440, while the sum is 26.

The square root of 51146621 is about 7151.6865842960. The cubic root of 51146621 is about 371.1980183959.

The spelling of 51146621 in words is "fifty-one million, one hundred forty-six thousand, six hundred twenty-one".