425531531 has 16 divisors (see below), whose sum is σ = 438271680. Its totient is φ = 413061120.

The previous prime is 425531521. The next prime is 425531537. The reversal of 425531531 is 135135524.

It is a cyclic number.

It is not a de Polignac number, because 425531531 - 2²⁶ = 358422667 is a prime.

It is a super-2 number, since 2×425531531² = 362154167750407922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 425531494 and 425531503.

It is not an unprimeable number, because it can be changed into a prime (425531537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765571 + ... + 1765811.

It is an arithmetic number, because the mean of its divisors is an integer number (27391980).

Almost surely, 2^425531531 is an apocalyptic number.

425531531 is a deficient number, since it is larger than the sum of its proper divisors (12740149).

425531531 is a wasteful number, since it uses less digits than its factorization.

425531531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its digits is 9000, while the sum is 29.

The square root of 425531531 is about 20628.4156202070. The cubic root of 425531531 is about 752.1606029348.

The spelling of 425531531 in words is "four hundred twenty-five million, five hundred thirty-one thousand, five hundred thirty-one".