531253403 has 4 divisors (see below), whose sum is σ = 531464208. Its totient is φ = 531042600.

The previous prime is 531253399. The next prime is 531253439. The reversal of 531253403 is 304352135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304352135 = 5 ⋅60870427.

It is a cyclic number.

It is not a de Polignac number, because 531253403 - 2² = 531253399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531253483) 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, 101576 + ... + 106677.

It is an arithmetic number, because the mean of its divisors is an integer number (132866052).

Almost surely, 2^531253403 is an apocalyptic number.

531253403 is a deficient number, since it is larger than the sum of its proper divisors (210805).

531253403 is a wasteful number, since it uses less digits than its factorization.

531253403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210804.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 531253403 is about 23048.9349645488. The cubic root of 531253403 is about 809.9046796332.

The spelling of 531253403 in words is "five hundred thirty-one million, two hundred fifty-three thousand, four hundred three".