1520053733 has 4 divisors (see below), whose sum is σ = 1658240448. Its totient is φ = 1381867020.

The previous prime is 1520053699. The next prime is 1520053781. The reversal of 1520053733 is 3373500251.

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: 3373500251 = 11 ⋅306681841.

It is a cyclic number.

It is not a de Polignac number, because 1520053733 - 2¹² = 1520049637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1520053696 and 1520053705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520053033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69093341 + ... + 69093362.

It is an arithmetic number, because the mean of its divisors is an integer number (414560112).

Almost surely, 2^1520053733 is an apocalyptic number.

It is an amenable number.

1520053733 is a deficient number, since it is larger than the sum of its proper divisors (138186715).

1520053733 is a wasteful number, since it uses less digits than its factorization.

1520053733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138186714.

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 1520053733 is about 38987.8664843307. The cubic root of 1520053733 is about 1149.7929641156.

Adding to 1520053733 its reverse (3373500251), we get a palindrome (4893553984).

The spelling of 1520053733 in words is "one billion, five hundred twenty million, fifty-three thousand, seven hundred thirty-three".