612681531 has 16 divisors (see below), whose sum is σ = 1018483968. Its totient is φ = 318276000.

The previous prime is 612681497. The next prime is 612681533. The reversal of 612681531 is 135186216.

It is not a de Polignac number, because 612681531 - 2²⁷ = 478463803 is a prime.

It is a super-2 number, since 2×612681531² = 750757316857007922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 612681492 and 612681501.

It is not an unprimeable number, because it can be changed into a prime (612681533) 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, 1325920 + ... + 1326381.

It is an arithmetic number, because the mean of its divisors is an integer number (63655248).

Almost surely, 2^612681531 is an apocalyptic number.

612681531 is a deficient number, since it is larger than the sum of its proper divisors (405802437).

612681531 is a wasteful number, since it uses less digits than its factorization.

612681531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652322.

The product of its digits is 8640, while the sum is 33.

The square root of 612681531 is about 24752.4045498614. The cubic root of 612681531 is about 849.3335172262. Note that the first 3 decimals are identical.

The spelling of 612681531 in words is "six hundred twelve million, six hundred eighty-one thousand, five hundred thirty-one".