51623460 has 144 divisors (see below), whose sum is σ = 186923520. Its totient is φ = 11793600.

The previous prime is 51623459. The next prime is 51623479. The reversal of 51623460 is 6432615.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25485 + ... + 27435.

It is an arithmetic number, because the mean of its divisors is an integer number (1298080).

Almost surely, 2^51623460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51623460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93461760).

51623460 is an abundant number, since it is smaller than the sum of its proper divisors (135300060).

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

51623460 is a wasteful number, since it uses less digits than its factorization.

51623460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51623460 is about 7184.9467638946. The cubic root of 51623460 is about 372.3480094001.

The spelling of 51623460 in words is "fifty-one million, six hundred twenty-three thousand, four hundred sixty".