5311021523 has 4 divisors (see below), whose sum is σ = 5311295088. Its totient is φ = 5310747960.

The previous prime is 5311021447. The next prime is 5311021567. The reversal of 5311021523 is 3251201135.

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 5311021523 - 2²⁶ = 5243912659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5311021423) 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, 105236 + ... + 147297.

It is an arithmetic number, because the mean of its divisors is an integer number (1327823772).

Almost surely, 2^5311021523 is an apocalyptic number.

5311021523 is a deficient number, since it is larger than the sum of its proper divisors (273565).

5311021523 is a wasteful number, since it uses less digits than its factorization.

5311021523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273564.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 5311021523 is about 72876.7557112691. The cubic root of 5311021523 is about 1744.7211288249.

Adding to 5311021523 its reverse (3251201135), we get a palindrome (8562222658).

The spelling of 5311021523 in words is "five billion, three hundred eleven million, twenty-one thousand, five hundred twenty-three".