724942531 has 4 divisors (see below), whose sum is σ = 731980912. Its totient is φ = 717904152.

The previous prime is 724942529. The next prime is 724942571. The reversal of 724942531 is 135249427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135249427 = 373 ⋅362599.

It is a cyclic number.

It is not a de Polignac number, because 724942531 - 2¹ = 724942529 is a prime.

It is a super-2 number, since 2×724942531² = 1051083346505371922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724942571) 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, 3519036 + ... + 3519241.

It is an arithmetic number, because the mean of its divisors is an integer number (182995228).

Almost surely, 2^724942531 is an apocalyptic number.

724942531 is a deficient number, since it is larger than the sum of its proper divisors (7038381).

724942531 is a wasteful number, since it uses less digits than its factorization.

724942531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038380.

The product of its digits is 60480, while the sum is 37.

The square root of 724942531 is about 26924.7568419847. The cubic root of 724942531 is about 898.3271522421.

The spelling of 724942531 in words is "seven hundred twenty-four million, nine hundred forty-two thousand, five hundred thirty-one".