51453997 has 4 divisors (see below), whose sum is σ = 58804576. Its totient is φ = 44103420.

The previous prime is 51453991. The next prime is 51454001. The reversal of 51453997 is 79935415.

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 51453997 - 2¹⁵ = 51421229 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 (51453991) 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, 3675279 + ... + 3675292.

It is an arithmetic number, because the mean of its divisors is an integer number (14701144).

Almost surely, 2^51453997 is an apocalyptic number.

It is an amenable number.

51453997 is a deficient number, since it is larger than the sum of its proper divisors (7350579).

51453997 is an equidigital number, since it uses as much as digits as its factorization.

51453997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350578.

The product of its digits is 170100, while the sum is 43.

The square root of 51453997 is about 7173.1441502315. The cubic root of 51453997 is about 371.9401303620.

The spelling of 51453997 in words is "fifty-one million, four hundred fifty-three thousand, nine hundred ninety-seven".