1553355242 has 4 divisors (see below), whose sum is σ = 2330032866. Its totient is φ = 776677620.

The previous prime is 1553355197. The next prime is 1553355283. The reversal of 1553355242 is 2425533551.

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., 1051640041 + 501715201 = 32429^2 + 22399^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388338809 + ... + 388338812.

Almost surely, 2^1553355242 is an apocalyptic number.

1553355242 is a deficient number, since it is larger than the sum of its proper divisors (776677624).

1553355242 is an equidigital number, since it uses as much as digits as its factorization.

1553355242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776677623.

The product of its digits is 90000, while the sum is 35.

The square root of 1553355242 is about 39412.6279509499. The cubic root of 1553355242 is about 1158.1289798993.

Adding to 1553355242 its reverse (2425533551), we get a palindrome (3978888793).

The spelling of 1553355242 in words is "one billion, five hundred fifty-three million, three hundred fifty-five thousand, two hundred forty-two".