51522142 has 8 divisors (see below), whose sum is σ = 88323696. Its totient is φ = 22080912.

The previous prime is 51522137. The next prime is 51522161. The reversal of 51522142 is 24122515.

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

It is a super-2 number, since 2×51522142² = 5309062232536328, which contains 22 as substring.

It is a congruent number.

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, 1840063 + ... + 1840090.

It is an arithmetic number, because the mean of its divisors is an integer number (11040462).

Almost surely, 2^51522142 is an apocalyptic number.

51522142 is a deficient number, since it is larger than the sum of its proper divisors (36801554).

51522142 is a wasteful number, since it uses less digits than its factorization.

51522142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680162.

The product of its digits is 800, while the sum is 22.

The square root of 51522142 is about 7177.8925876611. The cubic root of 51522142 is about 372.1042554747.

Adding to 51522142 its reverse (24122515), we get a palindrome (75644657).

The spelling of 51522142 in words is "fifty-one million, five hundred twenty-two thousand, one hundred forty-two".