42251512 has 16 divisors (see below), whose sum is σ = 81777600. Its totient is φ = 20444160.

The previous prime is 42251509. The next prime is 42251513. The reversal of 42251512 is 21515224.

It is a super-2 number, since 2×42251512² = 3570380532572288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84937 + ... + 85432.

It is an arithmetic number, because the mean of its divisors is an integer number (5111100).

Almost surely, 2^42251512 is an apocalyptic number.

It is an amenable number.

42251512 is a deficient number, since it is larger than the sum of its proper divisors (39526088).

42251512 is a wasteful number, since it uses less digits than its factorization.

42251512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170406 (or 170402 counting only the distinct ones).

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

The square root of 42251512 is about 6500.1163066518. The cubic root of 42251512 is about 348.2951431057.

Adding to 42251512 its reverse (21515224), we get a palindrome (63766736).

The spelling of 42251512 in words is "forty-two million, two hundred fifty-one thousand, five hundred twelve".