1533137121 has 12 divisors (see below), whose sum is σ = 2242564480. Its totient is φ = 1009153080.

The previous prime is 1533137117. The next prime is 1533137131. The reversal of 1533137121 is 1217313351.

It is a happy number.

1533137121 is a `hidden beast` number, since 1 + 533 + 1 + 3 + 7 + 121 = 666.

It is not a de Polignac number, because 1533137121 - 2² = 1533137117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1533137101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1077445 + ... + 1078866.

Almost surely, 2^1533137121 is an apocalyptic number.

It is an amenable number.

1533137121 is a deficient number, since it is larger than the sum of its proper divisors (709427359).

1533137121 is a wasteful number, since it uses less digits than its factorization.

1533137121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156396 (or 2156393 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 1533137121 is about 39155.2949292940. The cubic root of 1533137121 is about 1153.0823725754.

The spelling of 1533137121 in words is "one billion, five hundred thirty-three million, one hundred thirty-seven thousand, one hundred twenty-one".