51669401 has 4 divisors (see below), whose sum is σ = 59050752. Its totient is φ = 44288052.

The previous prime is 51669383. The next prime is 51669421. The reversal of 51669401 is 10496615.

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 not a de Polignac number, because 51669401 - 2¹⁰ = 51668377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51669421) 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, 3690665 + ... + 3690678.

It is an arithmetic number, because the mean of its divisors is an integer number (14762688).

Almost surely, 2^51669401 is an apocalyptic number.

It is an amenable number.

51669401 is a deficient number, since it is larger than the sum of its proper divisors (7381351).

51669401 is an equidigital number, since it uses as much as digits as its factorization.

51669401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381350.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51669401 is about 7188.1430842743. The cubic root of 51669401 is about 372.4584305668.

The spelling of 51669401 in words is "fifty-one million, six hundred sixty-nine thousand, four hundred one".