51601374 has 80 divisors (see below), whose sum is σ = 131725440. Its totient is φ = 14945040.

The previous prime is 51601373. The next prime is 51601427. The reversal of 51601374 is 47310615.

51601374 is a `hidden beast` number, since 51 + 601 + 3 + 7 + 4 = 666.

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 (51601373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40357 + ... + 41615.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^51601374 is an apocalyptic number.

51601374 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51601374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65862720).

51601374 is an abundant number, since it is smaller than the sum of its proper divisors (80124066).

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

51601374 is a wasteful number, since it uses less digits than its factorization.

51601374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51601374 is about 7183.4096360990. The cubic root of 51601374 is about 372.2949014321.

Adding to 51601374 its reverse (47310615), we get a palindrome (98911989).

The spelling of 51601374 in words is "fifty-one million, six hundred one thousand, three hundred seventy-four".