1225155023 has 4 divisors (see below), whose sum is σ = 1225323768. Its totient is φ = 1224986280.

The previous prime is 1225155013. The next prime is 1225155067. The reversal of 1225155023 is 3205515221.

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 1225155023 - 2¹⁰ = 1225153999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225154983 and 1225155001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225155013) 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, 72968 + ... + 88173.

It is an arithmetic number, because the mean of its divisors is an integer number (306330942).

Almost surely, 2^1225155023 is an apocalyptic number.

1225155023 is a deficient number, since it is larger than the sum of its proper divisors (168745).

1225155023 is an equidigital number, since it uses as much as digits as its factorization.

1225155023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168744.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1225155023 is about 35002.2145442256. The cubic root of 1225155023 is about 1070.0326140815.

The spelling of 1225155023 in words is "one billion, two hundred twenty-five million, one hundred fifty-five thousand, twenty-three".