25512031401 has 32 divisors (see below), whose sum is σ = 34626953088. Its totient is φ = 16705781760.

The previous prime is 25512031397. The next prime is 25512031417. The reversal of 25512031401 is 10413021552.

It is a happy number.

It is not a de Polignac number, because 25512031401 - 2² = 25512031397 is a prime.

It is a super-2 number, since 2×25512031401² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25512031201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39800041 + ... + 39800681.

It is an arithmetic number, because the mean of its divisors is an integer number (1082092284).

Almost surely, 2^25512031401 is an apocalyptic number.

It is an amenable number.

25512031401 is a deficient number, since it is larger than the sum of its proper divisors (9114921687).

25512031401 is a wasteful number, since it uses less digits than its factorization.

25512031401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 25512031401 its reverse (10413021552), we get a palindrome (35925052953).

The spelling of 25512031401 in words is "twenty-five billion, five hundred twelve million, thirty-one thousand, four hundred one".