51117442 has 8 divisors (see below), whose sum is σ = 76751100. Its totient is φ = 25533744.

The previous prime is 51117439. The next prime is 51117463. The reversal of 51117442 is 24471115.

It can be written as a sum of positive squares in 2 ways, for example, as 47073321 + 4044121 = 6861^2 + 2011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51117442² = 5225985753246728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9817 + ... + 14092.

Almost surely, 2^51117442 is an apocalyptic number.

51117442 is a deficient number, since it is larger than the sum of its proper divisors (25633658).

51117442 is a wasteful number, since it uses less digits than its factorization.

51117442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24980.

The product of its digits is 1120, while the sum is 25.

The square root of 51117442 is about 7149.6462849570. The cubic root of 51117442 is about 371.1274158344.

Adding to 51117442 its reverse (24471115), we get a palindrome (75588557).

The spelling of 51117442 in words is "fifty-one million, one hundred seventeen thousand, four hundred forty-two".