51973164 has 60 divisors (see below), whose sum is σ = 138799584. Its totient is φ = 16950816.

The previous prime is 51973157. The next prime is 51973171. The reversal of 51973164 is 46137915.

It is an interprime number because it is at equal distance from previous prime (51973157) and next prime (51973171).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13522 + ... + 16934.

Almost surely, 2^51973164 is an apocalyptic number.

51973164 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51973164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69399792).

51973164 is an abundant number, since it is smaller than the sum of its proper divisors (86826420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51973164 is a wasteful number, since it uses less digits than its factorization.

51973164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3465 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 51973164 is about 7209.2415689863. The cubic root of 51973164 is about 373.1868958706.

The spelling of 51973164 in words is "fifty-one million, nine hundred seventy-three thousand, one hundred sixty-four".