51346890 has 96 divisors (see below), whose sum is σ = 153878400. Its totient is φ = 11636352.

The previous prime is 51346837. The next prime is 51346901. The reversal of 51346890 is 9864315.

It is a super-2 number, since 2×51346890² = 5273006225344200, which contains 22 as substring.

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, 93597 + ... + 94143.

It is an arithmetic number, because the mean of its divisors is an integer number (1602900).

Almost surely, 2^51346890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51346890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76939200).

51346890 is an abundant number, since it is smaller than the sum of its proper divisors (102531510).

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

51346890 is a wasteful number, since it uses less digits than its factorization.

51346890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51346890 is about 7165.6744274353. The cubic root of 51346890 is about 371.6818733570.

The spelling of 51346890 in words is "fifty-one million, three hundred forty-six thousand, eight hundred ninety".