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63457031 = 1131712621
BaseRepresentation
bin1111001000010…
…0011100000111
311102101221200102
43302010130013
5112221111111
610144034315
71400242631
oct362043407
9142357612
1063457031
1132902230
121930299b
13101ba651
1485dba51
15588713b
hex3c84707

63457031 has 16 divisors (see below), whose sum is σ = 72493056. Its totient is φ = 55020000.

The previous prime is 63457021. The next prime is 63457057. The reversal of 63457031 is 13075436.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-63457031 is a prime.

It is a super-2 number, since 2×634570312 = 8053589566669922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 63456985 and 63457003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63457001) 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, 22901 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (4530816).

Almost surely, 263457031 is an apocalyptic number.

63457031 is the 3563-rd centered decagonal number.

63457031 is a deficient number, since it is larger than the sum of its proper divisors (9036025).

63457031 is a wasteful number, since it uses less digits than its factorization.

63457031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 63457031 is about 7965.9921541513. The cubic root of 63457031 is about 398.8656004689.

The spelling of 63457031 in words is "sixty-three million, four hundred fifty-seven thousand, thirty-one".

Divisors: 1 11 31 71 341 781 2201 2621 24211 28831 81251 186091 893761 2047001 5768821 63457031