251416425 has 24 divisors (see below), whose sum is σ = 447651904. Its totient is φ = 123773760.

The previous prime is 251416411. The next prime is 251416447. The reversal of 251416425 is 524614152.

It is not a de Polignac number, because 251416425 - 2¹⁶ = 251350889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251416392 and 251416401.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127957 + ... + 129906.

Almost surely, 2^251416425 is an apocalyptic number.

251416425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251416425 is a deficient number, since it is larger than the sum of its proper divisors (196235479).

251416425 is a wasteful number, since it uses less digits than its factorization.

251416425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257889 (or 257884 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 251416425 is about 15856.1163277771. The cubic root of 251416425 is about 631.1480075717.

The spelling of 251416425 in words is "two hundred fifty-one million, four hundred sixteen thousand, four hundred twenty-five".