3651421531 has 2 divisors, whose sum is σ = 3651421532. Its totient is φ = 3651421530.

The previous prime is 3651421519. The next prime is 3651421547. The reversal of 3651421531 is 1351241563.

3651421531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3651421531 - 2²⁷ = 3517203803 is a prime.

It is a super-2 number, since 2×3651421531² = 26665758394100767922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3651421493 and 3651421502.

It is not a weakly prime, because it can be changed into another prime (3651421031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1825710765 + 1825710766.

It is an arithmetic number, because the mean of its divisors is an integer number (1825710766).

Almost surely, 2^3651421531 is an apocalyptic number.

3651421531 is a deficient number, since it is larger than the sum of its proper divisors (1).

3651421531 is an equidigital number, since it uses as much as digits as its factorization.

3651421531 is an evil number, because the sum of its binary digits is even.

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

The square root of 3651421531 is about 60426.9933969911. The cubic root of 3651421531 is about 1539.8815801167.

It can be divided in two parts, 365 and 1421531, that multiplied together give a palindrome (518858815).

The spelling of 3651421531 in words is "three billion, six hundred fifty-one million, four hundred twenty-one thousand, five hundred thirty-one".