1625111023 has 4 divisors (see below), whose sum is σ = 1695768048. Its totient is φ = 1554454000.

The previous prime is 1625111009. The next prime is 1625111029. The reversal of 1625111023 is 3201115261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201115261 = 1217 ⋅2630333.

It is a cyclic number.

It is not a de Polignac number, because 1625111023 - 2⁹ = 1625110511 is a prime.

It is a super-2 number, since 2×1625111023² = 5281971674152213058, 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 = 1625110985 and 1625111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35328478 + ... + 35328523.

It is an arithmetic number, because the mean of its divisors is an integer number (423942012).

Almost surely, 2^1625111023 is an apocalyptic number.

1625111023 is a deficient number, since it is larger than the sum of its proper divisors (70657025).

1625111023 is an equidigital number, since it uses as much as digits as its factorization.

1625111023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70657024.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1625111023 is about 40312.6657888064. The cubic root of 1625111023 is about 1175.6941178384.

Adding to 1625111023 its reverse (3201115261), we get a palindrome (4826226284).

The spelling of 1625111023 in words is "one billion, six hundred twenty-five million, one hundred eleven thousand, twenty-three".