1553451013 has 4 divisors (see below), whose sum is σ = 1603562368. Its totient is φ = 1503339660.

The previous prime is 1553450993. The next prime is 1553451019. The reversal of 1553451013 is 3101543551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3101543551 = 4261 ⋅727891.

It is a cyclic number.

It is not a de Polignac number, because 1553451013 - 2²¹ = 1551353861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553451019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25055631 + ... + 25055692.

It is an arithmetic number, because the mean of its divisors is an integer number (400890592).

Almost surely, 2^1553451013 is an apocalyptic number.

It is an amenable number.

1553451013 is a deficient number, since it is larger than the sum of its proper divisors (50111355).

1553451013 is an equidigital number, since it uses as much as digits as its factorization.

1553451013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50111354.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1553451013 is about 39413.8429108353. The cubic root of 1553451013 is about 1158.1527806132.

Adding to 1553451013 its reverse (3101543551), we get a palindrome (4654994564).

The spelling of 1553451013 in words is "one billion, five hundred fifty-three million, four hundred fifty-one thousand, thirteen".