51749626 has 16 divisors (see below), whose sum is σ = 80015040. Its totient is φ = 25085920.

The previous prime is 51749623. The next prime is 51749651. The reversal of 51749626 is 62694715.

It is a super-2 number, since 2×51749626² = 5356047582279752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51749623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11805 + ... + 15583.

It is an arithmetic number, because the mean of its divisors is an integer number (5000940).

Almost surely, 2^51749626 is an apocalyptic number.

51749626 is a deficient number, since it is larger than the sum of its proper divisors (28265414).

51749626 is a wasteful number, since it uses less digits than its factorization.

51749626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989.

The product of its digits is 90720, while the sum is 40.

The square root of 51749626 is about 7193.7212901252. The cubic root of 51749626 is about 372.6510979586.

The spelling of 51749626 in words is "fifty-one million, seven hundred forty-nine thousand, six hundred twenty-six".