51364740 has 72 divisors (see below), whose sum is σ = 167311872. Its totient is φ = 11739840.

The previous prime is 51364739. The next prime is 51364741. The reversal of 51364740 is 4746315.

It is an interprime number because it is at equal distance from previous prime (51364739) and next prime (51364741).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51364698 and 51364707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51364741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5796 + ... + 11675.

It is an arithmetic number, because the mean of its divisors is an integer number (2323776).

Almost surely, 2^51364740 is an apocalyptic number.

It is an amenable number.

51364740 is an abundant number, since it is smaller than the sum of its proper divisors (115947132).

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

51364740 is a wasteful number, since it uses less digits than its factorization.

51364740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17497 (or 17488 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 51364740 is about 7166.9198404894. The cubic root of 51364740 is about 371.7249383008.

The spelling of 51364740 in words is "fifty-one million, three hundred sixty-four thousand, seven hundred forty".