51020342 has 4 divisors (see below), whose sum is σ = 76530516. Its totient is φ = 25510170.

The previous prime is 51020341. The next prime is 51020363. The reversal of 51020342 is 24302015.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51020342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755084 + ... + 12755087.

It is an arithmetic number, because the mean of its divisors is an integer number (19132629).

Almost surely, 2^51020342 is an apocalyptic number.

51020342 is a deficient number, since it is larger than the sum of its proper divisors (25510174).

51020342 is a wasteful number, since it uses less digits than its factorization.

51020342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25510173.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 51020342 is about 7142.8525114271. The cubic root of 51020342 is about 370.8922755220.

Adding to 51020342 its reverse (24302015), we get a palindrome (75322357).

The spelling of 51020342 in words is "fifty-one million, twenty thousand, three hundred forty-two".