31561402053102 has 16 divisors (see below), whose sum is σ = 65867273850240. Its totient is φ = 10063055727032.

The previous prime is 31561402053101. The next prime is 31561402053107. The reversal of 31561402053102 is 20135020416513.

It is a super-2 number, since 2×31561402053102² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31561402053101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114352905852 + ... + 114352906127.

It is an arithmetic number, because the mean of its divisors is an integer number (4116704615640).

Almost surely, 2^{31561402053102} is an apocalyptic number.

31561402053102 is an abundant number, since it is smaller than the sum of its proper divisors (34305871797138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31561402053102 is a wasteful number, since it uses less digits than its factorization.

31561402053102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228705812007.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 31561402053102 its reverse (20135020416513), we get a palindrome (51696422469615).

The spelling of 31561402053102 in words is "thirty-one trillion, five hundred sixty-one billion, four hundred two million, fifty-three thousand, one hundred two".