50721210 has 96 divisors (see below), whose sum is σ = 139501440. Its totient is φ = 12760704.

The previous prime is 50721197. The next prime is 50721221. The reversal of 50721210 is 1212705.

It is a super-2 number, since 2×50721210² = 5145282287728200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon 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, 221376 + ... + 221604.

It is an arithmetic number, because the mean of its divisors is an integer number (1453140).

Almost surely, 2^50721210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50721210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69750720).

50721210 is an abundant number, since it is smaller than the sum of its proper divisors (88780230).

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

50721210 is a wasteful number, since it uses less digits than its factorization.

50721210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 50721210 is about 7121.8824758627. The cubic root of 50721210 is about 370.1660078047.

Adding to 50721210 its reverse (1212705), we get a palindrome (51933915).

The spelling of 50721210 in words is "fifty million, seven hundred twenty-one thousand, two hundred ten".