51452069 has 4 divisors (see below), whose sum is σ = 51473760. Its totient is φ = 51430380.

The previous prime is 51452059. The next prime is 51452077. The reversal of 51452069 is 96025415.

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-51452069 is a prime.

It is a super-2 number, since 2×51452069² = 5294630808761522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51452059) 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, 6779 + ... + 12200.

It is an arithmetic number, because the mean of its divisors is an integer number (12868440).

Almost surely, 2^51452069 is an apocalyptic number.

It is an amenable number.

51452069 is a deficient number, since it is larger than the sum of its proper divisors (21691).

51452069 is a wasteful number, since it uses less digits than its factorization.

51452069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21690.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 51452069 is about 7173.0097588112. The cubic root of 51452069 is about 371.9354847266.

The spelling of 51452069 in words is "fifty-one million, four hundred fifty-two thousand, sixty-nine".