31380351025 has 27 divisors (see below), whose sum is σ = 39546657003. Its totient is φ = 24701098800.

The previous prime is 31380350977. The next prime is 31380351029. The reversal of 31380351025 is 52015308313.

The square root of 31380351025 is 177145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11296926369 + 20083424656 = 106287^2 + 141716^2 .

It is not a de Polignac number, because 31380351025 - 2⁹ = 31380350513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31380351029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 62886226 + ... + 62886724.

Almost surely, 2^31380351025 is an apocalyptic number.

31380351025 is the 177145-th square number.

31380351025 is the 88573-rd centered octagonal number.

It is an amenable number.

31380351025 is a deficient number, since it is larger than the sum of its proper divisors (8166305978).

31380351025 is an frugal number, since it uses more digits than its factorization.

31380351025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 31380351025 its reverse (52015308313), we get a palindrome (83395659338).

The spelling of 31380351025 in words is "thirty-one billion, three hundred eighty million, three hundred fifty-one thousand, twenty-five".