402123431542 has 8 divisors (see below), whose sum is σ = 689354454096. Its totient is φ = 172338613512.

The previous prime is 402123431537. The next prime is 402123431579. The reversal of 402123431542 is 245134321204.

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

It is a super-2 number, since 2×402123431542² (a number of 24 digits) 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, 14361551113 + ... + 14361551140.

It is an arithmetic number, because the mean of its divisors is an integer number (86169306762).

Almost surely, 2^402123431542 is an apocalyptic number.

402123431542 is a deficient number, since it is larger than the sum of its proper divisors (287231022554).

402123431542 is a wasteful number, since it uses less digits than its factorization.

402123431542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28723102262.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 402123431542 its reverse (245134321204), we get a palindrome (647257752746).

The spelling of 402123431542 in words is "four hundred two billion, one hundred twenty-three million, four hundred thirty-one thousand, five hundred forty-two".