625402831 has 4 divisors (see below), whose sum is σ = 628207552. Its totient is φ = 622598112.

The previous prime is 625402781. The next prime is 625402847. The reversal of 625402831 is 138204526.

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 625402831 - 2¹⁵ = 625370063 is a prime.

It is a super-2 number, since 2×625402831² = 782257402045629122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625402793 and 625402802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625402031) 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 3 ways as a sum of consecutive naturals, for example, 1402026 + ... + 1402471.

It is an arithmetic number, because the mean of its divisors is an integer number (157051888).

Almost surely, 2^625402831 is an apocalyptic number.

625402831 is a deficient number, since it is larger than the sum of its proper divisors (2804721).

625402831 is a wasteful number, since it uses less digits than its factorization.

625402831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804720.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 625402831 is about 25008.0553222357. The cubic root of 625402831 is about 855.1716222404.

The spelling of 625402831 in words is "six hundred twenty-five million, four hundred two thousand, eight hundred thirty-one".