51450069 has 8 divisors (see below), whose sum is σ = 74836512. Its totient is φ = 31181840.

The previous prime is 51450067. The next prime is 51450073. The reversal of 51450069 is 96005415.

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

It is a cyclic number.

It is not a de Polignac number, because 51450069 - 2¹ = 51450067 is a prime.

It is a super-2 number, since 2×51450069² = 5294219200209522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51450067) 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, 779514 + ... + 779579.

It is an arithmetic number, because the mean of its divisors is an integer number (9354564).

Almost surely, 2^51450069 is an apocalyptic number.

It is an amenable number.

51450069 is a deficient number, since it is larger than the sum of its proper divisors (23386443).

51450069 is a wasteful number, since it uses less digits than its factorization.

51450069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559107.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51450069 is about 7172.8703459633. The cubic root of 51450069 is about 371.9306654801.

The spelling of 51450069 in words is "fifty-one million, four hundred fifty thousand, sixty-nine".