1225400031 has 12 divisors (see below), whose sum is σ = 1771105752. Its totient is φ = 816433296.

The previous prime is 1225400021. The next prime is 1225400063. The reversal of 1225400031 is 1300045221.

1225400031 is a `hidden beast` number, since 122 + 540 + 0 + 0 + 3 + 1 = 666.

1225400031 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1225400031 - 2⁵ = 1225399999 is a prime.

It is a super-2 number, since 2×1225400031² = 3003210471949601922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1225399977 and 1225400013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225400021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25836 + ... + 55841.

It is an arithmetic number, because the mean of its divisors is an integer number (147592146).

Almost surely, 2^1225400031 is an apocalyptic number.

1225400031 is a deficient number, since it is larger than the sum of its proper divisors (545705721).

1225400031 is a wasteful number, since it uses less digits than its factorization.

1225400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83350 (or 83347 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1225400031 is about 35005.7142621030. The cubic root of 1225400031 is about 1070.1039381375.

Adding to 1225400031 its reverse (1300045221), we get a palindrome (2525445252).

The spelling of 1225400031 in words is "one billion, two hundred twenty-five million, four hundred thousand, thirty-one".