625023251 has 4 divisors (see below), whose sum is σ = 626179104. Its totient is φ = 623867400.

The previous prime is 625023247. The next prime is 625023253. The reversal of 625023251 is 152320526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152320526 = 2 ⋅76160263.

It is a cyclic number.

It is not a de Polignac number, because 625023251 - 2² = 625023247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625023251.

It is not an unprimeable number, because it can be changed into a prime (625023253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577115 + ... + 578196.

It is an arithmetic number, because the mean of its divisors is an integer number (156544776).

Almost surely, 2^625023251 is an apocalyptic number.

625023251 is a deficient number, since it is larger than the sum of its proper divisors (1155853).

625023251 is a wasteful number, since it uses less digits than its factorization.

625023251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155852.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 625023251 is about 25000.4650156752. The cubic root of 625023251 is about 854.9985755137.

Adding to 625023251 its reverse (152320526), we get a palindrome (777343777).

The spelling of 625023251 in words is "six hundred twenty-five million, twenty-three thousand, two hundred fifty-one".