51723117 has 40 divisors (see below), whose sum is σ = 80150400. Its totient is φ = 33224256.

The previous prime is 51723107. The next prime is 51723127. The reversal of 51723117 is 71132715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51723107) and next prime (51723127).

It is not a de Polignac number, because 51723117 - 2¹² = 51719021 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 (51723107) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 377473 + ... + 377609.

It is an arithmetic number, because the mean of its divisors is an integer number (2003760).

Almost surely, 2^51723117 is an apocalyptic number.

It is an amenable number.

51723117 is a deficient number, since it is larger than the sum of its proper divisors (28427283).

51723117 is a wasteful number, since it uses less digits than its factorization.

51723117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 278 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 51723117 is about 7191.8785445807. The cubic root of 51723117 is about 372.5874563056.

The spelling of 51723117 in words is "fifty-one million, seven hundred twenty-three thousand, one hundred seventeen".