253421051402 has 4 divisors (see below), whose sum is σ = 380131577106. Its totient is φ = 126710525700.

The previous prime is 253421051297. The next prime is 253421051431. The reversal of 253421051402 is 204150124352.

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., 178623724321 + 74797327081 = 422639^2 + 273491^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63355262849 + ... + 63355262852.

Almost surely, 2^253421051402 is an apocalyptic number.

253421051402 is a deficient number, since it is larger than the sum of its proper divisors (126710525704).

253421051402 is a wasteful number, since it uses less digits than its factorization.

253421051402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126710525703.

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

Adding to 253421051402 its reverse (204150124352), we get a palindrome (457571175754).

The spelling of 253421051402 in words is "two hundred fifty-three billion, four hundred twenty-one million, fifty-one thousand, four hundred two".