51123042 has 32 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 16935984.

The previous prime is 51123041. The next prime is 51123047. The reversal of 51123042 is 24032115.

It is a super-2 number, since 2×51123042² = 5227130846667528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51123041) 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, 6184 + ... + 11852.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^51123042 is an apocalyptic number.

51123042 is an abundant number, since it is smaller than the sum of its proper divisors (63184158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51123042 is a wasteful number, since it uses less digits than its factorization.

51123042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847 (or 5841 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51123042 is about 7150.0379019974. The cubic root of 51123042 is about 371.1409678795.

Adding to 51123042 its reverse (24032115), we get a palindrome (75155157).

The spelling of 51123042 in words is "fifty-one million, one hundred twenty-three thousand, forty-two".