1520252523 has 16 divisors (see below), whose sum is σ = 2384710560. Its totient is φ = 953883648.

The previous prime is 1520252501. The next prime is 1520252561. The reversal of 1520252523 is 3252520251.

It is not a de Polignac number, because 1520252523 - 2¹⁸ = 1519990379 is a prime.

It is a super-2 number, since 2×1520252523² = 4622335467375731058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1520252593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1655590 + ... + 1656507.

It is an arithmetic number, because the mean of its divisors is an integer number (149044410).

Almost surely, 2^1520252523 is an apocalyptic number.

1520252523 is a deficient number, since it is larger than the sum of its proper divisors (864458037).

1520252523 is a wasteful number, since it uses less digits than its factorization.

1520252523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312123 (or 3312117 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1520252523 is about 38990.4157838821. The cubic root of 1520252523 is about 1149.8430845763.

Adding to 1520252523 its reverse (3252520251), we get a palindrome (4772772774).

The spelling of 1520252523 in words is "one billion, five hundred twenty million, two hundred fifty-two thousand, five hundred twenty-three".