1553202051 has 4 divisors (see below), whose sum is σ = 2070936072. Its totient is φ = 1035468032.

The previous prime is 1553202043. The next prime is 1553202067. The reversal of 1553202051 is 1502023551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1553202051 - 2³ = 1553202043 is a prime.

It is a super-2 number, since 2×1553202051² = 4824873222461213202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1553202031) 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, 258867006 + ... + 258867011.

It is an arithmetic number, because the mean of its divisors is an integer number (517734018).

Almost surely, 2^1553202051 is an apocalyptic number.

1553202051 is a deficient number, since it is larger than the sum of its proper divisors (517734021).

1553202051 is an equidigital number, since it uses as much as digits as its factorization.

1553202051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517734020.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1553202051 is about 39410.6844776895. The cubic root of 1553202051 is about 1158.0909073099.

The spelling of 1553202051 in words is "one billion, five hundred fifty-three million, two hundred two thousand, fifty-one".