253513121154442 has 4 divisors (see below), whose sum is σ = 380269681731666. Its totient is φ = 126756560577220.

The previous prime is 253513121154379. The next prime is 253513121154457. The reversal of 253513121154442 is 244451121315352.

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., 171390540407641 + 82122580746801 = 13091621^2 + 9062151^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63378280288609 + ... + 63378280288612.

Almost surely, 2^{253513121154442} is an apocalyptic number.

253513121154442 is a deficient number, since it is larger than the sum of its proper divisors (126756560577224).

253513121154442 is a wasteful number, since it uses less digits than its factorization.

253513121154442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126756560577223.

The product of its digits is 576000, while the sum is 43.

Adding to 253513121154442 its reverse (244451121315352), we get a palindrome (497964242469794).

The spelling of 253513121154442 in words is "two hundred fifty-three trillion, five hundred thirteen billion, one hundred twenty-one million, one hundred fifty-four thousand, four hundred forty-two".