31421610420061 has 4 divisors (see below), whose sum is σ = 32435210756224. Its totient is φ = 30408010083900.

The previous prime is 31421610420017. The next prime is 31421610420113. The reversal of 31421610420061 is 16002401612413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31421610420061 - 2¹³ = 31421610411869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1013600336131 = 31421610420061 / (3 + 1 + 4 + 2 + 1 + 6 + 1 + 0 + 4 + 2 + 0 + 0 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421610420961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506800168035 + ... + 506800168096.

It is an arithmetic number, because the mean of its divisors is an integer number (8108802689056).

Almost surely, 2^{31421610420061} is an apocalyptic number.

31421610420061 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31421610420061 is a deficient number, since it is larger than the sum of its proper divisors (1013600336163).

31421610420061 is a wasteful number, since it uses less digits than its factorization.

31421610420061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013600336162.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 31421610420061 in words is "thirty-one trillion, four hundred twenty-one billion, six hundred ten million, four hundred twenty thousand, sixty-one".