50721406 has 32 divisors (see below), whose sum is σ = 81259200. Its totient is φ = 23708160.

The previous prime is 50721403. The next prime is 50721409. The reversal of 50721406 is 60412705.

It is an interprime number because it is at equal distance from previous prime (50721403) and next prime (50721409).

It is a super-2 number, since 2×50721406² = 5145322053233672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50721403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448806 + ... + 448918.

It is an arithmetic number, because the mean of its divisors is an integer number (2539350).

Almost surely, 2^50721406 is an apocalyptic number.

50721406 is a deficient number, since it is larger than the sum of its proper divisors (30537794).

50721406 is a wasteful number, since it uses less digits than its factorization.

50721406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 50721406 is about 7121.8962362562. The cubic root of 50721406 is about 370.1664846101.

The spelling of 50721406 in words is "fifty million, seven hundred twenty-one thousand, four hundred six".