155212140425 has 6 divisors (see below), whose sum is σ = 192463054158. Its totient is φ = 124169712320.

The previous prime is 155212140397. The next prime is 155212140451. The reversal of 155212140425 is 524041212551.

It can be written as a sum of positive squares in 3 ways, for example, as 4507129 + 155207633296 = 2123^2 + 393964^2 .

It is not a de Polignac number, because 155212140425 - 2¹⁶ = 155212074889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155212140391 and 155212140400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3104242784 + ... + 3104242833.

It is an arithmetic number, because the mean of its divisors is an integer number (32077175693).

Almost surely, 2^155212140425 is an apocalyptic number.

It is an amenable number.

155212140425 is a deficient number, since it is larger than the sum of its proper divisors (37250913733).

155212140425 is an equidigital number, since it uses as much as digits as its factorization.

155212140425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208485627 (or 6208485622 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 155212140425 its reverse (524041212551), we get a palindrome (679253352976).

The spelling of 155212140425 in words is "one hundred fifty-five billion, two hundred twelve million, one hundred forty thousand, four hundred twenty-five".