42051222031502 has 4 divisors (see below), whose sum is σ = 63076833047256. Its totient is φ = 21025611015750.

The previous prime is 42051222031393. The next prime is 42051222031543. The reversal of 42051222031502 is 20513022215024.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512805507874 + ... + 10512805507877.

It is an arithmetic number, because the mean of its divisors is an integer number (15769208261814).

Almost surely, 2^{42051222031502} is an apocalyptic number.

42051222031502 is a deficient number, since it is larger than the sum of its proper divisors (21025611015754).

42051222031502 is a wasteful number, since it uses less digits than its factorization.

42051222031502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025611015753.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 42051222031502 its reverse (20513022215024), we get a palindrome (62564244246526).

The spelling of 42051222031502 in words is "forty-two trillion, fifty-one billion, two hundred twenty-two million, thirty-one thousand, five hundred two".