1520213534 has 12 divisors (see below), whose sum is σ = 2652617664. Its totient is φ = 651520044.

The previous prime is 1520213533. The next prime is 1520213537. The reversal of 1520213534 is 4353120251.

It is a happy number.

It is a super-2 number, since 2×1520213534² = 4622098377913538312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520213531) 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 5 ways as a sum of consecutive naturals, for example, 7756094 + ... + 7756289.

It is an arithmetic number, because the mean of its divisors is an integer number (221051472).

Almost surely, 2^1520213534 is an apocalyptic number.

1520213534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1520213534 is a deficient number, since it is larger than the sum of its proper divisors (1132404130).

1520213534 is a wasteful number, since it uses less digits than its factorization.

1520213534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15512399 (or 15512392 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1520213534 is about 38989.9157988319. The cubic root of 1520213534 is about 1149.8332547148.

Adding to 1520213534 its reverse (4353120251), we get a palindrome (5873333785).

The spelling of 1520213534 in words is "one billion, five hundred twenty million, two hundred thirteen thousand, five hundred thirty-four".