51740451 has 20 divisors (see below), whose sum is σ = 88333872. Its totient is φ = 29565648.

The previous prime is 51740431. The next prime is 51740453. The reversal of 51740451 is 15404715.

It is a happy number.

It is not a de Polignac number, because 51740451 - 2⁵ = 51740419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51740453) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45060 + ... + 46193.

Almost surely, 2^51740451 is an apocalyptic number.

51740451 is a deficient number, since it is larger than the sum of its proper divisors (36593421).

51740451 is an equidigital number, since it uses as much as digits as its factorization.

51740451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91272 (or 91263 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51740451 is about 7193.0835529695. The cubic root of 51740451 is about 372.6290734780.

The spelling of 51740451 in words is "fifty-one million, seven hundred forty thousand, four hundred fifty-one".