51109390 has 32 divisors (see below), whose sum is σ = 95613696. Its totient is φ = 19649280.

The previous prime is 51109367. The next prime is 51109391. The reversal of 51109390 is 9390115.

It is a super-2 number, since 2×51109390² = 5224339492344200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51109391) 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, 53154 + ... + 54106.

It is an arithmetic number, because the mean of its divisors is an integer number (2987928).

Almost surely, 2^51109390 is an apocalyptic number.

51109390 is a deficient number, since it is larger than the sum of its proper divisors (44504306).

51109390 is a wasteful number, since it uses less digits than its factorization.

51109390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 51109390 is about 7149.0831580001. The cubic root of 51109390 is about 371.1079281948.

The spelling of 51109390 in words is "fifty-one million, one hundred nine thousand, three hundred ninety".