425172515 has 4 divisors (see below), whose sum is σ = 510207024. Its totient is φ = 340138008.

The previous prime is 425172511. The next prime is 425172541. The reversal of 425172515 is 515271524.

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 425172515 - 2² = 425172511 is a prime.

It is a super-2 number, since 2×425172515² = 361543335022850450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425172511) 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, 42517247 + ... + 42517256.

It is an arithmetic number, because the mean of its divisors is an integer number (127551756).

Almost surely, 2^425172515 is an apocalyptic number.

425172515 is a deficient number, since it is larger than the sum of its proper divisors (85034509).

425172515 is an equidigital number, since it uses as much as digits as its factorization.

425172515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85034508.

The product of its digits is 14000, while the sum is 32.

The square root of 425172515 is about 20619.7118069094. The cubic root of 425172515 is about 751.9490137031.

Subtracting 425172515 from its reverse (515271524), we obtain a palindrome (90099009).

The spelling of 425172515 in words is "four hundred twenty-five million, one hundred seventy-two thousand, five hundred fifteen".