400005134225 has 24 divisors (see below), whose sum is σ = 517825493952. Its totient is φ = 305940888000.

The previous prime is 400005134189. The next prime is 400005134293. The reversal of 400005134225 is 522431500004.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-400005134225 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400005134194 and 400005134203.

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, 1011050 + ... + 1349900.

It is an arithmetic number, because the mean of its divisors is an integer number (21576062248).

Almost surely, 2^400005134225 is an apocalyptic number.

It is an amenable number.

400005134225 is a deficient number, since it is larger than the sum of its proper divisors (117820359727).

400005134225 is a wasteful number, since it uses less digits than its factorization.

400005134225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340937 (or 340932 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 400005134225 its reverse (522431500004), we get a palindrome (922436634229).

The spelling of 400005134225 in words is "four hundred billion, five million, one hundred thirty-four thousand, two hundred twenty-five".