42250100402 has 4 divisors (see below), whose sum is σ = 63375150606. Its totient is φ = 21125050200.

The previous prime is 42250100351. The next prime is 42250100407. The reversal of 42250100402 is 20400105224.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 35506241761 + 6743858641 = 188431^2 + 82121^2 .

It is not an unprimeable number, because it can be changed into a prime (42250100407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562525099 + ... + 10562525102.

Almost surely, 2^42250100402 is an apocalyptic number.

42250100402 is a deficient number, since it is larger than the sum of its proper divisors (21125050204).

42250100402 is a wasteful number, since it uses less digits than its factorization.

42250100402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21125050203.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 42250100402 its reverse (20400105224), we get a palindrome (62650205626).

The spelling of 42250100402 in words is "forty-two billion, two hundred fifty million, one hundred thousand, four hundred two".