407225343781 has 4 divisors (see below), whose sum is σ = 408526383532. Its totient is φ = 405924304032.

The previous prime is 407225343743. The next prime is 407225343793. The reversal of 407225343781 is 187343522704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 183535128100 + 223690215681 = 428410^2 + 472959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-407225343781 is a prime.

It is a super-2 number, since 2×407225343781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407225344781) 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, 650519406 + ... + 650520031.

It is an arithmetic number, because the mean of its divisors is an integer number (102131595883).

Almost surely, 2^407225343781 is an apocalyptic number.

It is an amenable number.

407225343781 is a deficient number, since it is larger than the sum of its proper divisors (1301039751).

407225343781 is a wasteful number, since it uses less digits than its factorization.

407225343781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301039750.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 407225343781 in words is "four hundred seven billion, two hundred twenty-five million, three hundred forty-three thousand, seven hundred eighty-one".