61430031 has 12 divisors (see below), whose sum is σ = 95558008. Its totient is φ = 37803024.

The previous prime is 61429997. The next prime is 61430053. The reversal of 61430031 is 13003416.

It is not a de Polignac number, because 61430031 - 2⁶ = 61429967 is a prime.

It is a super-2 number, since 2×61430031² = 7547297417321922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61429986 and 61430013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61431031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262405 + ... + 262638.

Almost surely, 2^61430031 is an apocalyptic number.

61430031 is a deficient number, since it is larger than the sum of its proper divisors (34127977).

61430031 is a wasteful number, since it uses less digits than its factorization.

61430031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525062 (or 525059 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 61430031 is about 7837.7312406078. The cubic root of 61430031 is about 394.5725890127.

Adding to 61430031 its reverse (13003416), we get a palindrome (74433447).

The spelling of 61430031 in words is "sixty-one million, four hundred thirty thousand, thirty-one".