51754621 has 4 divisors (see below), whose sum is σ = 51808572. Its totient is φ = 51700672.

The previous prime is 51754609. The next prime is 51754631. The reversal of 51754621 is 12645715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12645715 = 5 ⋅2529143.

It can be written as a sum of positive squares in 2 ways, for example, as 47403225 + 4351396 = 6885^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 51754621 - 2²³ = 43366013 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 (51754631) 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, 25510 + ... + 27463.

It is an arithmetic number, because the mean of its divisors is an integer number (12952143).

Almost surely, 2^51754621 is an apocalyptic number.

It is an amenable number.

51754621 is a deficient number, since it is larger than the sum of its proper divisors (53951).

51754621 is an equidigital number, since it uses as much as digits as its factorization.

51754621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53950.

The product of its digits is 8400, while the sum is 31.

The square root of 51754621 is about 7194.0684595019. The cubic root of 51754621 is about 372.6630873036.

The spelling of 51754621 in words is "fifty-one million, seven hundred fifty-four thousand, six hundred twenty-one".